НАЗЕМНАЯ ОБЗОРНАЯ РАДИОЛОКАЦИОННАЯ СТАНЦИЯ АЭРОПОРТА И РАДИОЛОКАЦИОННАЯ УСТАНОВКА

Обзорная радиолокационная станция содержит в комбинации одну неподвижную антенну 10 для обеспечения электронного сканирования контролируемого пространства по азимуту в горизонтальной плоскости, источник излучения GEN и средства приема/передачи сверхвысокочастотного сигнала НFА, НFВ с циркулятором 20, канал передачи VЕ, канал приема VR и средства для подразделения упомянутого выше канала приема на сигнал суммы VRI и по меньшей мере один сигнал разности VR2. Первый и второй приемные элементы с изменением частоты RECI и RЕС2 принимают соответственно сигнал суммы и сигнал разности и выдают свои выходные сигналы, закодированные в цифровой форме. Средства обработки 40 обрабатывают цифровые сигналы, поступающие из первого и второго приемных элементов, для радиолокационного выявления объектов или целей в контролируемой зоне.

Verfahren zum Betreiben eines Radarsystems

The invention relates to a method for operating a radar system. Radar systems are used for determing the distance of at least one reflecting object in an observation area and/or the speed of the at least one reflecting object. Said type of radar system emits successive pulses corresponding to a predetermined pulse duration with a specific pulse repetition frequency as emission signals in the observation area and receives the emission pulses of the emission signal reflected on the at least one reflecting object as a receiving signal. The disadvantage of such a method is that it involves a high signal dynamics, which has a negative effect on the price of circuit parts required for signal processing. The novel method for working the radar system should be developed via an economic means. According to the novel method the signal dynamics are reduced by predetermining the average output of the emission signal and by reducing the average output of the emission signal by variation, preferably ...

Removing range ambiguity in a pulse-doppler radar

This invention relates to a method of and a device for removing range ambiguity in a pulse Doppler radar and to a radar including such a device especially for missile guidance. On tracking operation at a high pulse repetition frequency the method consists in switching the repetition frequency fR (k) for each time interval DELTA t, over a new value fR(k+1) obtained in a circuit from the measured ambiguous range y(k) and from the ambiguity number n(k), as estimated in a circuit from radar information supplied by the radar, in order to remove eclipsing, to maintain the ambiguity number constant and to estimate the range with a growing accuracy in the course of the tracking operation.

Pulse radar with linearly variable frequency carrier

Meteorological radar apparatus

Meteorological radar apparatus

AMBIGUOUS RADAR RANGE RESOLUTION USING RANGE LOOKUP TABLE

System and method for determining range to targets using an M-of-N range resolver includes transmitting multiple coherent processing interval (CPI) signals with different pulse repetition frequencies (PRFs) towards the targets, receiving and storing threshold hits from prior N-1 CPIs; converting the threshold hits from the current CPI and prior N-1 CPIs to range unfolded threshold hits; generating a lookup table of the plurality of range unfolded threshold hits from the prior N-1 CPIs; determining the number of the prior N-1 CPIs in which a range unfolded threshold hit from the current CPI has at least one range coincident range unfolded threshold hit from a prior CPI utilizing the lookup table; generating a range resolved threshold hit when the number is greater than or equal to M-1; accumulating range resolved threshold hits; and determining the range to the targets.

AN ULTRA WIDE BAND COHERENT RADAR SYSTEM OPTIMISING THE RADIO INTERFERENCE DISCRIMINATION CAPABILITY

The present invention relates to an ultra wide band coherent radar system assessing the Doppler shift of the returned radar echoes, which radar system optimises the radio interference discrimination capability. The radar system comprises a control unit by which the transmit-receive process is partitioned into a number of consecutive sub-processes each of which consists of transmission followed by reception of a signal having a relative bandwidth of a fraction of an octave and where the received signals from the different narrow band transmissions are used to reconstruct broad band radar data by pulse compression techniques. Further, the control unit is arranged to determine the recurrence time, i.e. the time lapse between two consecutive transmissions, of a narrow band signal for a certain frequency step to be approximately inversely proportional to the frequency of this step and higher or equal to the Nyquist rate with respect to the Doppler bandwidth at this frequency.

RADAR/SONAR SYSTEM CONCEPT FOR EXTENDED RANGE-DOPPLER COVERAGE

A method and apparatus for preventing the occurence of range ambiguities and Doppler ambiguities in both a radar and sonar environment. A series of N pulses are produced, each of which contains a number of contagious subpulses. Each of the subpulses exhibits a different frequency than the remaining subpulses in that particular pulse. Furthermore, the order of appearance of the subpulses in each of the pulses is unique with respect to the remaining pulses in the series. A matched filter receiver (10) and Doppler processor (30) are used to provide auto correlations and cross correlations (R1-RN) to prevent the range ambiguities and Doppler ambiguities.

Rückstrahlortungsgerät mit variabler Impulsfolgefrequenz

Meteorological radar set

IMPROVEMENTS WITH THE RADARS HAS IMPULSES COHERENT

MULTICOLOURED RANGEFINDER

Device radar of monitoring on the ground, in particular for airport

Le dispositif radar de surveillance comprend en combinaison une antenne fixe (10) pour fournir un balayage électronique de l'espace en gisement dans le plan horizontal, une source d'émission (GEN) et des moyens d'émission/réception hyperfréquence (HFA; HFB), avec un circulateur (20), une voie d'émission (VE), une voie de réception (VR) et des moyens (DIR; 29) pour subdiviser la voie de réception en un signal somme (VR1) et au moins un signal différence (VR2). Un premier et un second éléments récepteurs avec changement de fréquence (REC1 et REC2), reçoivent respectivement les signaux somme et différence, et fournissent des sorties codées en numérique. Des moyens de traitement (40) traitent des signaux numériques issus des premier et second éléments récepteurs (REC1 et REC2), pour la détection radar d'objets dans la zone surveillée. The surveillance radar device comprises in combination a fixed antenna (10) for providing an electronic scan of the space in the horizontal plane, a transmission source (GEN) and microwave transmission / reception means (HFA; HFB), with a circulator (20), a transmission channel (VE), a reception channel (VR) and means (DIR; 29) for subdividing the reception channel into a sum signal (VR1) and at least a difference signal (VR2). First and second receiver elements with frequency change (REC1 and REC2), respectively receive the sum and difference signals, and provide digital coded outputs. Processing means (40) process digital signals from the first and second receiving elements (REC1 and REC2), for radar detection of objects in the monitored area.

DEVICE OF LIFTING Of AMBIGUITY OF DISTANCE AND SPEED MORE PARTICULARLY USES ASSOCIATES HAS a RECEIVER RADAR OF the DOPPLER TYPE, AND RADAR COMPRISING IT

ELECTRONIC WARFARE ASSET MANAGEMENT SYSTEM

An electronic warfare asset management system allows for pre-mission planning and ranking of emitter targets within a theater of operations while further allowing real-time adjustments to the emitter rankings. The asset management system may further evaluate and optimize asset architecture to allow multiple assets to work in parallel to increase the probability of intercept for any specific target emitter.

AN ULTRA WIDE BAND COHERENT RADAR SYSTEM OPTIMISING THE RADIO INTERFERENCE DISCRIMINATION CAPABILITY

The present invention relates to an ultra wide band coherent radar system assessing the Doppler shift of the returned radar echoes, which radar system optimises the radio interference discrimination capability. The radar system comprises a control unit by which the transmit-receive process is partitioned into a number of consecutive sub-processes each of which consists of transmission followed by reception of a signal having a relative bandwidth of a fraction of an octave and where the received signals from the different narrow band transmissions are used to reconstruct broad band radar data by pulse compression techniques. Further, the control unit is arranged to determine the recurrence time, i.e. the time lapse between two consecutive transmissions, of a narrow band signal for a certain frequency step to be approximately inversely proportional to the frequency of this step and higher or equal to the Nyquist rate with respect to the Doppler bandwidth at this frequency.

Two frequency pulse radar - has bistable switch and coincidence circuit to compare transmitted and received pulses

The pulse radar appts. which transmits trains of pulses having two different repetition rates f1 and f2 (with f1 f2) which serve for removal of ambiguity, includes a bistable switching stage (1) which alternately switches a test pulse through frequencies f1 and f2, together with a coincidence circuit arrangement 3, 4) which compares a delayed echo pulse with the output signals of the bistable switching stage, to form a selction criterion. The time delay interval (tau 1) of the echo pulse depends on the output and input cycle time of the echo and test pulses. The bistable switching circuit may be controlled by the leading edge of the test pulse. The switching arrangement ensures a suitable relationship between the noise and effective power.

Radareinrichtung

Eine Radareinrichtung umfasst eine Radarsignal-Ausgabeeinheit (1), die Radarsignale, deren Frequenz sich mit Ablauf von Zeit ändert, in einem uneinheitlichen Wiederholungszeitraum wiederholt ausgibt.

Object detection device

Improvements in or relating to radar systems

... 967,083. Radar. MARCONI CO. Ltd. May 21, 1962 [Aug. 4, 1961], No. 28388/61. Heading H4D. Relates to a C.W. radar system of the kind in which the transmitted waves are modulated in phase or frequency by a modulating frequency which is so adjusted that the modulation on the received echo signal is in a predetermined phase relationship with the modulation on the transmitted waves. According to the invention there are provided a plurality of variable different - frequency modulating sources in predetermined frequency relationships, means enabling those sources to be applied in succession to modulate the transmitted waves and means, controlled by received signals and operable when any one source is applied to modulate the transmitted waves, for automatically adjusting that source to that synchronous ranging frequency which is nearest to the frequency of the source before such adjustment is effected. In the embodiment C.W. microwave energy from unit X2 is phase modulated by a frequency fed over ...

REMOVING RANGE AMBIGUITY IN A PULSE-DOPPLER RADAR

RADAR SYSTEMS

... 1459266 Secondary radar system SIEMENS AG 14 March 1974 [21 May 1973] 11309/74 Heading H4D The Specification describes a system for differentiating between desired (synchronous) and undesired (asynchronous) target response signals received by a secondary radar device, which is operably associated with a primary radar device, there being a plurality of such associated devices in a vicinity, and a particular target within said vicinity, equipped with a transponder activated by pulsed interrogation signals received from said secondary radar devices, the interrogation signals transmitted by each of which being obtained by means of integral frequency division of the transmitted pulse repetition frequency of the primary radar devices which have an identical or similar P.R.F. to one another. The system includes an interference blanking device which operates as a "defruiter", by suppressing undesired response signals produced by the transponder due to reception of interrogation signals from other ...

Improvements in and relating to electric gauges

... 526,847. Electromagnetic tests. BRITISH THOMSON-HOUSTON CO., Ltd. March 27, 1939, No. 9509. Convention date, March 26, 1938. [Class 37] Electromagnetic gauging apparatus comprises a pair of double coils having their cores arranged end-to-end and provided with an armature located in the air-gap thus formed, the armature being connected mechanically with a spindle engaging the object measured and varying the reluctance of the magnetic circuits in opposite senses. The coils are connected Wheatstone-bridge fashion to a responsive device. In Fig. 2, a pair of double coil magnets are carried on a non-magnetic support 19, the armature 34 being mounted on a block 20 carrying a feeler spindle 14. The block 20 is resiliently connected to the support 19 by magnetic clamps and springs 21 ... 23. The windings 28, 29 and 31, 32 of the magnets are arranged in a bridge, Fig. 3 ; are energized from a transformer 40, 41 with a saturated core ; and are connected to a full wave rectifier and instrument 43, ...

Ambiguous radar range resolution using range lookup table

System and method for determining range to targets using an M-of-N range resolver includes transmitting multiple coherent processing interval (CPI) signals with different pulse repetition frequencies (PRFs) towards the targets, receiving and storing threshold hits from prior N-1 CPIs; converting the threshold hits from the current CPI and prior N-1 CPIs to range unfolded threshold hits; generating a lookup table of the plurality of range unfolded threshold hits from the prior N-1 CPIs; determining the number of the prior N-1 CPIs in which a range unfolded threshold hit from the current CPI has at least one range coincident range unfolded threshold hit from a prior CPI utilizing the lookup table; generating a range resolved threshold hit when the number is greater than or equal to M-1; accumulating range resolved threshold hits; and determining the range to the targets.

RADAR ANTI-FADE SYSTEMS AND METHODS

A method for suppressing ground return radar fading in a radar altimeter (10) is described. The method includes providing a radar gate width which corresponds to an area (140) that is smaller than an antenna illumination area being impinged by transmissions of the radar altimeter, dithering the radar gate viewing area (102) within the antenna illumination area being impinged by transmissions of the radar altimeter, and taking radar return samples with the radar altimeter.

Fluid flow control apparatus and process

WEATHER APPARATUS RADAR

DEVICE OF LIFTING Of AMBIGUITY OF DISTANCE AND SPEED MORE PARTICULARLY USES ASSOCIATES HAS a RECEIVER RADAR OF the DOPPLER TYPE, AND RADAR COMPRISING IT

Improvements to coherent pulse radars

A coherent pulse radar is actuated successively according to at least two repetition frequencies FR1 and FR2. These frequencies have values such that the received signal is ambiguous in terms of both distance and speed, and such that their ratio can be reduced to the quotient of two integers P1 and P2 which are close to each other and mutually prime. For the frequency analysis, a number of samples are taken which depends on the repetition frequency, the numbers of samples associated with the two repetition frequencies being in the ratio of the two integers P1 and P2. The distance/speed resolution cell is then invariant as regards the repetition frequency, which removes the ambiguity about average data taken over a long integration time.

Pulse repetition optimisation process for mobile pulse doppler ground radars

The optimisation process entails NCB combinations of NFR possible pulse repetition frequencies (PRFs) (R1). A test ground zone, assumed known is entered into the calculation in quantum strips. For each PRF set, there will be areas where the ground return may obscure the target. In a second step (R2) the number of detections for that PRF are calculated over the strip, with the results recorded as a vector set (R3), and a factor assigned to the combination step (R4) which is then compared with previous PRF combinations, and following the iterative process the optimum condition chosen.

Radar control device and method of controlling transmission power of radar

A radar control device is provided, which includes a signal generating module configured to generate a transmission pattern signal comprised of at least one kind of pulse signal that is set among pulse signals including first and second pulse signals, a transmitter configured to externally transmit the transmission pattern signal via a radar antenna, a detector configured to detect transmission power of each pulse signal included in the transmission pattern signal, and a processing circuit configured to control, when the transmission pattern signal includes the second pulse signal, the transmission power of the transmission pattern signal by using a control value calculated based on the transmission power of the second pulse signal, and control, when the transmission pattern signal consists of the first signal, the transmission power of the first pulse signal by using a control value previously used for controlling the transmission power of the second pulse signal.

APPARATUS AND METHOD FOR IMPROVING AND SCHEDULING OF RADAR SYSTEMS

An apparatus (100) for improving an airborne radar system (30) based on sensor data of an airborne electro-optical sensor (50) is disclosed. The electro-optical sensor (50) is configured to provide optical sensor data for at least a partial surround view. The apparatus (100) comprises a processing module (110) configured to identify in the optical sensor data one or more regions of interest, ROI (70), and to determine at least one characteristic of the ROI (70); and a control module (120) configured to control at least one parameter of the radar system (30) based on the at least one characteristic.

REMOVING RANGE AND SPEED AMBIGUITY IN A DOPPLER TYPE RADAR

Improvements in or relating to repetitive signal systems

Radar apparatus and signal processing method

Electromagnetic sensor system

GROUND MONITORING RADAR SYSTEM, IN PARTICULAR FOR AIRPORT

Radar devices for low power applications and bathroom fixtures

PROCESS FOR ADAPTING THE POST INTEGRATION IN A SWITCHED PULSE REPETITION FREQUENCY RADAR AND A CIRCUIT IMPLEMENTING THIS PROCESS

A process and a circuit for adapting the post integration in a switched pulse repetition frequency radar, in which the post integration of the detected signals is effected as a function of the signal received from the Doppler filter. For this purpose, switches are used and controlled by comparator circuits. The invention is useful in frequency ambiguous coherent Doppler radars using recurrence frequency switching by blocks.

HIGH-RESOLUTION SYNTHETIC APERTURE RADAR DEVICE AND ANTENNA FOR A HIGH-RESOLUTION SYNTHETIC APERTURE RADAR DEVICE

The invention relates to a high-resolution synthetic aperture radar device (10) comprising at least one transmitting antenna (TX1-TX3) for producing and emitting radar pulses for scanning an object (12), a receiving antenna (14) for receiving the radar beams (20, 22, 24) emitted and reflected by an object, wherein the receiving antenna (14) has several sub-apertures (RX1-RX17) arranged along elevation, which form a minimum of azimuth apertures, wherein the high-resolution synthetic aperture radar device is embodied such that pulse signals (18) are emitted at irregular time intervals.

HIGH-RESOLUTION SYNTHETIC APERTURE RADAR DEVICE AND ANTENNA FOR ONE SUCH RADAR DEVICE

RADAR DEVICE AND METHOD FOR PREVENTING RADIO WAVE INTERFERENCE

COHERENT DOPPLER RADAR HAS IMPULSES HAS AGILITIES OF FREQUENCY

PERFECTIONNEMENTS AUX RADARS DOPPLER A IMPULSIONS

L'INVENTION CONCERNE UN RADAR DOPPLER COHERENT A IMPULSIONS FONCTIONNANT A MOYENNE FREQUENCE DE REPETITION DES IMPULSIONS. SELON L'INVENTION, LES IMPULSIONS SONT EMISES SELON UNE SEQUENCE REPETITIVE B DE BLOCS D'IMPULSIONS RECURRENTES. LES FREQUENCES DE REPETITION DES BLOCS SONT REPARTIES DE MANIERE ALEATOIRE DANS LE DOMAINE DES MOYENNES FREQUENCES DE REPETITION. LE RADAR EST COUPLE A UNE ANTENNE A BALAYAGE RAPIDE EN SITE QUI EFFECTUE B BALAYAGES EN SITE COUVRANT UNE ZONE QUI COMPORTE Q CELLULES DE RESOLUTION EN SITE ET UNE CELLULE DE RESOLUTION EN GISEMENT. LA PRESENTE INVENTION S'APPLIQUE AUX RADARS AEROPORTES DE SURVEILLANCE.

Pulse Doppler radar with modifiable repetition frequency for airborne application

Un pilote de haute précision (20) produit la fréquence d'émission utilisée par l'amplificateur d'émission (14) et appliquée par un circulateur (12) à une antenne (10) unique d'émission/réception. Après les circuits de réception hyperfréquence (16), un mélangeur (18) transpose à une fréquence intermédiaire (Fio ). Définie par le pilote (20), cette fréquence (Fio ) est également appliquée à un organe (3) qui lui ajoute une composante Doppler (Fds ) liée par exemple au fouillis de sol. On en déduit par division la fréquence de répétition (FR), qui est appliquée à un circuit (52) de découpage émission/réception. Les raies dues au fouillis de sol sont alors en superposition sur celles liées au découpage de la réception par rapport à la fréquence de répétition de l'émission quelle que soit la fréquence de répétition.

Improvements to pulsed Doppler radars

DISPOSITIF DE LEVEE D'AMBIGUITE DE DISTANCE ET DE VITESSE PLUS PARTICULIEREMENT UTILISE ASSOCIE A UN RECEPTEUR RADAR DU TYPE DOPPLER, ET RADAR LE COMPORTANT

LE DISPOSITIF CONCERNE LE TRAITEMENT DES SIGNAUX ISSUS D'UN RECEPTEUR RADAR DU TYPE DOPPLER. LES CARACTERISTIQUES DES ECHOS MESUREES A DEUX FREQUENCES DE REPETITION DIFFERENTES SONT STOCKEES DANS UNE MEMOIRE 1. DEUX CIRCUITS DE CALCUL 3 ET 4 DELIVRENT A PARTIR DES SIGNAUX D'UN COUPLE DE DEUX ECHOS, LA DISTANCE VRAIE ET LA FREQUENCE DOPPLER VRAIE DE LA CIBLE ASSOCIEE A CES DEUX ECHOS. L'INVENTION S'APPLIQUE A TOUS LES EQUIPEMENTS ELECTROMAGNETIQUES DE DETECTION EMETTANT DES IMPULSIONS.

RADAR DEVICES FOR LOW POWER APPLICATIONS AND BATHROOM FIXTURES

A fluid flow device includes an actuator, an RF transmitter, a gated RF receiver, and a processor. The RF transmitter is configured and arranged to produce a plurality of pulses of RF energy spaced apart in time to form a sensor field. The gated RF receiver is configured and arranged to receive RF energy reflected by objects within the sensor field. The processor is coupled to the gated RF receiver for evaluating the reflected RF energy. The processor is also coupled to the actuator and is configured and arranged to activate the actuator in response to the reflected RF energy to control fluid flow. In addition, a new low power radar sensor operates by providing radar pulses that are non-uniformly spaced in time. In operation, a burst of pulses is initiated in the transmitter. Between each burst is a period of rest time in which the transmitter is not transmitting RF energy.

All weather tactical strike system (AWISS) and method of operation

An AWTSS is shown to be made up of an improved synthetic aperture radar (SAR) for generating radar maps with various degrees of resolution required for navigation of an aircraft and detection of ground targets in the presence of electronic countermeasures and clutter. The SAR consists, in effect, of four frequency-agile radars sharing quadrants of a single array antenna mounted within a radome of a "four axis" gimbal with a sidelobe cancelling subarray mounted at the phase center of each quadrant. Motion sensors are also mounted on the single array antenna to provide signals for compensating for vibration and stored compensating signals are used to compensate for radome-induced errors. In addition, a signal processor is shown which is selectively operable to generate radar maps of any one of a number of desired degrees of resolution, such processor being adapted to operate in the presence of clutter or jamming signals.

Pulse repetition frequency section method and system

The objectives of the invention are met by an improved radar tracking system and a process of radar tracking. In the improved system and process, an estimate of a target range and a range uncertainity swath from a first radar system is inputted into a second radar system along with a duty factor. The second radar system determines a set of zero eclipse intervals and respective ranges of range pulse repetition frequencies that solves a first set of equations. A usable range pulse repetition frequency is chosen from the results. Next, an estimated target Doppler frequency region and a Doppler uncertainity swath is inputted into the second radar system. The second radar system is instructed to determine a set of clear Doppler frequency region intervals, and respective ranges of Doppler frequency pulse repetition frequencies by solving a second set of equations. A usable pulse repetition frequency is chosen that is present in at least one of the ranges of range pulse repetition frequencies ...

Method and apparatus for measuring velocity and turbulence of atmospheric flows

A method and apparatus for measuring the parameters of atmospheric turbulent flows utilizes the Doppler shifted frequencies of received radar signals backscattered from sound generated aerodynamically by atmospheric turbulent flows. Doppler frequency bandwidths of the received backscattered signals are used to estimate the atmospheric flow turbulence and the mean frequency within a bandwidth is processed to estimate its radial flow velocity. Total flow velocity and the flow velocity angle with respect to the antenna boresight of the atmospheric turbulent flow may be estimated by estimating the radial flow velocity at two radial positions and processing these radial velocities. Processing of the Doppler data is initiated when the total signal power within the Doppler frequency band exceeds a predetermined power level.

НАЗЕМНАЯ ОБЗОРНАЯ РАДИОЛОКАЦИОННАЯ СТАНЦИЯ АЭРОПОРТА И РАДИОЛОКАЦИОННАЯ УСТАНОВКА

FIELD: navigation. SUBSTANCE: ground surveillance airport radar includes one immobile antenna for electron scanning of control area by azimuth in horizontal plane, radiation source and means for reception/transmission of superhigh-frequency signal with circulator, transmission channel, reception channel and means for division of mentioned reception channel into elements receiving signal of sum and one signal as minimum of difference. First and second receiving elements receive correspondingly signal of sum and signal of difference with change of frequency and generate their output signals coded in digital form. Digital signals coming from first and second receiving elements are processed for radar detection of objects or targets in controlled area. EFFECT: simplicity and reduced cost of operation of surveillance airport radar. 21 cl, 31 dwg ГУСЯ ГГЕС ПЫ ГЭ РОССИЙСКОЕ АГЕНТСТВО ПО ПАТЕНТАМ И ТОВАРНЫМ ЗНАКАМ (19) ВИ "” 2115 141 ' 13) СЛ ОМК” 6 01$ 13/91, 13/02 12) ОПИСАНИЕ ИЗОБРЕТЕНИЯ К ПАТЕНТУ РОССИЙСКОЙ ФЕДЕРАЦИИ (21), (22) Заявка: 94016388/09, 13.05.1994 (30) Приоритет: 14.06.1993 ЕК 9307149 (46) Дата публикации: 10.07.1998 (56) Ссылки: СВ, патент, 2165414, кл. С 01 $ 13/91, 1986. Леонов А.И., Фомичев К.И. Мо ноимпульсная радиолокация.-М.: Радио связь, 1984, с.82-88. (71) Заявитель: Дассо Электроник (ЕК) (72) Изобретатель: Ксавье Шазелль (ЕК), Бернар Мэтр (ЕК), Бертран Огю (ЕК) (73) Патентообладатель: Дассо Электроник (ЕК) (54) НАЗЕМНАЯ ОБЗОРНАЯ РАДИОЛОКАЦИОННАЯ СТАНЦИЯ АЭРОПОРТА И РАДИОЛОКАЦИОННАЯ УСТАНОВКА (57) Реферат: Обзорная радиолокационная станция содержит в комбинации одну неподвижную антенну для обеспечения электронного сканирования контролируемого пространства по азимуту в горизонтальной плоскости, источник излучения и средства приема передачи сверхвысокочастотного сигнала с циркулятором, канал передачи, канал приема и средства для подразделения упомянутого выше канала приема на сигнал сумки и по меньшей мере один сигнал разности. Первый и второй ...

Способ обнаружения, измерения дальностей, скоростей и ускорений нескольких малоскоростных низковысотных целей в главном луче импульсно-доплеровских радиолокаторов

Изобретение относится к радиолокации воздушных целей (ВЦ) и может быть использовано в стационарных и мобильных импульсно-доплеровских радиолокаторах (ИДРЛ) с квазинепрерывным излучением при линейной частотной модуляции несущей частоты (ЛЧМ). Техническим результатом является расширение функциональных возможностей ИДРЛ в части, касающейся обеспечения возможности его применения в многоцелевых ситуациях в главном луче при сложной сигнально-помеховой обстановке, обусловленной мешающими отражениями от земли. В заявленном способе при задаваемых различных значениях крутизны ЛЧМ и предварительно рассчитываемых границах спектра мешающих отражений обеспечивают возможность обнаружения и измерения дальномерных частот сигналов нескольких ВЦ, вынесенных с помощью ЛЧМ за границы этого спектра, причем ВЦ могут быть высоко- и малоскоростными, зависшими, неразличимыми или различимыми по дальности, соответственно находящимися в одном или в разных дискретах дальности. При идентификации комбинаций – триад дальномерных ...

Impulsradar

Verfahren und Einrichtung zur Aufzeichnung von Impulsfolgen

ELEKTROMAGNETISCHES SENSORSYSTEM

Resolving range rate ambiguity in sensor returns

Electromagnetic sensor system

Target subjects the crushing device, sending pulse control device transitive mark the crushing method

Ground surveillance radar device, in particular for airport.

PROCEEDED Of ADAPTATION OF the POST-INTEGRATION IN a RADAR HAS FREQUENCIES OF RECURRENCE COMMUTEES AND CIRCUIT IMPLEMENTING THIS PROCESS

METHOD FOR AMBIGUITY PROCESSING WITH DISTANCE IN A PULSED RADAR DOPPLER SHIFT, DEVICE THEREFOR AND RADAR COMPRISING SUCH A DEVICE

COHERENT DOPPLER RADAR HAS IMPULSES HAS AGILITIES OF FREQUENCY

METHOD TO OPTIMIZE DETECTION OF SEA TARGETS AND RADAR IMPLEMENTING SUCH A METHOD

La détection étant réalisée pour une mission donnée, le procédé comporte au moins : - Une phase (21) d'analyse de l'environnement à l'aide d'une forme d'onde (212) préalablement choisie, les signaux acquis avec cette forme d'onde étant analysés par des moyens de traitement (213) pour en déduire des caractéristiques d'environnement (222) ; - Une phase (22) d'élaboration d'une onde de détection (20) optimale en fonction desdites caractéristiques d'environnement et des caractéristiques de ladite mission. The detection being performed for a given mission, the method comprises at least: A phase (21) for analyzing the environment using a previously chosen waveform (212), the signals acquired with this waveform being analyzed by processing means (213) to derive environmental features (222); - A phase (22) for developing an optimal detection wave (20) according to said environmental characteristics and characteristics of said mission.

SYSTEM AND METHOD FOR DETECTION AND DISCRIMINATION OF TARGETS IN THE PRESENCE OF INTERFERENCE

Systems and method of detection and discrimination of targets in the presence of interference are disclosed. A system transmits a signal and then receives signals including interference and reflections of transmitted signals. The system processes the received signals and transmitted signals to generate a 2D representation of the STAP cube with one of the dimensions collapsed. The system then reduces the interference contributions and identifies angle and Doppler component of potential targets. The system then computes slices, which are one dimensional representation of cross-ambiguity functions of the received and transmitted signals. It reduces the interference contributions in the slices and determines range components of the targets.

RADAR ANTI-FADE SYSTEMS AND METHODS

A method for suppressing ground return radar fading in a radar altimeter (10) is described. The method includes providing a radar gate width which corresponds to an area (140) that is smaller than an antenna illumination area being impinged by transmissions of the radar altimeter, dithering the radar gate viewing area (102) within the antenna illumination area being impinged by transmissions of the radar altimeter, and taking radar return samples with the radar altimeter.

Pulse repetition frequency section method and system

The objectives of the invention are met by an improved radar tracking system and a process of radar tracking. In the improved system and process, an estimate of a target range and a range uncertainity swath from a first radar system is inputted into a second radar system along with a duty factor. The second radar system determines a set of zero eclipse intervals and respective ranges of range pulse repetition frequencies that solves a first set of equations. A usable range pulse repetition frequency is chosen from the results. Next, an estimated target Doppler frequency region and a Doppler uncertainity swath is inputted into the second radar system. The second radar system is instructed to determine a set of clear Doppler frequency region intervals, and respective ranges of Doppler frequency pulse repetition frequencies by solving a second set of equations. A usable pulse repetition frequency is chosen that is present in at least one of the ranges of range pulse repetition frequencies ...

Pulsed coherent doppler radar with frequency agility

A pulse coherent Doppler radar allows both transmission frequency agility and pulse repetition frequency agility in association with phase encoding which accomplishes the transmission frequency agility by the use of a transmission oscillator, the nominal frequency which may be modified by a microcomputer, a local oscillator, a reference oscillator, and a phase-locked loop having a phase comparator with the oscillator and a mixer for receiving the signals issued by the oscillator and the signal issued by the local oscillator.

Verfahren zur Detektion und Entfernungsbestimmung von Zielen mittels einer HPRF-Radaranlage

RADAR SYSTEM

Advanced touchless plumbing systems

METEOROLOGICAL RADAR APPARATUS

A meteorological radar apparatus which calculates a shift of the pulse synchronization of a transmission pulse signal output from a transmission unit and corrects the transmission timing of the transmission pulse signal based on the shift of the pulse synchronization so that the Doppler velocity of a reference target becomes zero, thereby preventing deterioration in the measurement accuracy of the Doppler velocity caused by the shift of the pulse synchronization of the transmission pulse signal.

SYNTHETIC APERTURE RADAR

A method of operating synthetic aperture radar in a low PRF mode, comprising generating a stream of radar pulses, imposing onto said stream a predetermined modulation of the Pulse Repetition Frequency (PRF), directing said stream to a target area, and processing received pulses, comprising separating the received pulses as a sequence of sets, and superposing received radar pulses of said sets, whereby to enhance the central received lobe and to attenuate side lobes.

PERFECTIONNEMENTS AUX RADARS A IMPULSIONS COHERENTS

UN RADAR A IMPULSIONS COHERENT EST ACTIONNE SUCCESSIVEMENT SELON AU MOINS DEUX FREQUENCES DE RECURRENCE FR1 ET FR2. CES FREQUENCES SONT DE VALEURS TELLES QUE LE SIGNAL RECU SOIT AMBIGU A LA FOIS EN DISTANCE ET EN VITESSE, ET QUE LEUR RAPPORT SOIT REDUCTIBLE AU QUOTIENT DE DEUX NOMBRES ENTIERS P ET P, VOISINS ET PREMIERS ENTRE EUX. POUR L'ANALYSE FREQUENTIELLE, ON PRELEVE UN NOMBRE D'ECHANTILLONS QUI DEPEND DE LA FREQUENCE DE RECURRENCE, LES NOMBRES D'ECHANTILLONS ASSOCIES AUX DEUX FREQUENCES DE RECURRENCE ETANT ENTRE EUX DANS LE RAPPORT DES DEUX NOMBRES ENTIERS P ET P. LA CELLULE DE RESOLUTION DISTANCEVITESSE EST ALORS INVARIANTE A L'EGARD DE LA FREQUENCE DE RECURRENCE, CE QUI PERMET DE LEVER L'AMBIGUITE SUR DES INFORMATIONS MOYENNES PORTANT SUR UN TEMPS D'INTEGRATION LONG.

RADAR SYSTEMS

PROCEEDED OF LIFTING Of AMBIGUITY IN DISTANCE IN a RADAR PULSATES DOPPLER, DEVICE FOR SA IMPLEMENTED AND RADAR COMPRISING SUCH a DEVICE

LA PRESENTE INVENTION CONCERNE UN PROCEDE DE LEVEE D'AMBIGUITE EN DISTANCE DANS UN RADAR PULSE DOPPLER AINSI QUE LE DISPOSITIF POUR LE METTRE EN OEUVRE ET LE RADAR COMPORTANT UN TEL DISPOSITIF. LE RADAR 2 A FREQUENCE DE REPETITION ELEVEE TRAVAILLANT EN MODE POURSUITE, LE PROCEDE DE LA PRESENTE INVENTION CONSISTE A COMMUTER LA FREQUENCE DE REPETITION F(K), POUR CHAQUE INTERVALLE DE TEMPS DT, SUR UNE NOUVELLE VALEUR F(K 1) OBTENUE DANS UN CIRCUIT 1 A PARTIR DE LA DISTANCE AMBIGUE MESUREE Y(K) ET DU NUMERO D'AMBIGUITE N(K), ESTIME DANS UN CIRCUIT 2 A PARTIR DE CERTAINES DONNEES (VITESSE V DE LA CIBLE, PUISSANCE P) FOURNIES PAR LE RADAR, AFIN D'ELIMINER LES PHENOMENES D'ECLIPSE, DE MAINTENIR CONSTANT LE NUMERO D'AMBIGUITE ET D'ESTIMER LA DISTANCE AVEC UNE PRECISION CROISSANTE AU COURS DE LA POURSUITE. LA PRESENTE INVENTION EST APPLICABLE AU GUIDAGE DE MISSILES.

SYSTEM AND METHOD FOR DETECTION AND DISCRIMINATION OF TARGETS IN THE PRESENCE OF INTERFERENCE

Systems and method of detection and discrimination of targets in the presence of interference are disclosed. A system transmits a signal and then receives signals including interference and reflections of transmitted signals. The system processes the received signals and transmitted signals to generate a 2D representation of the STAP cube with one of the dimensions collapsed. The system then reduces the interference contributions and identifies angle and Doppler component of potential targets. The system then computes slices, which are one dimensional representation of cross-ambiguity functions of the received and transmitted signals. It reduces the interference contributions in the slices and determines range components of the targets.

Radar sensor, corresponding operating method and vehicle

A radar sensor for detecting at least one object, having a control device to receive a control input signal; a signal generator to generate a transmit signal having a multitude of signal cycles, each signal cycle having a multitude of signal sequences, and a series of blocks being formed, each block having precisely one frequency ramp of each signal sequence, and the signal generator furthermore being designed to select a predefined quantity of blocks from the transmit signal based on the control input signal and to output them as output signal; an antenna device to transmit the output signal that is output by the signal generator and to receive a receive signal; and an evaluation device which is designed to ascertain, by superpositioning the transmit signal and the receive signal, a quantity with regard to an angle and/or a distance and/or a relative speed of the at least one object.

RADAR APPARATUS AND RADAR METHOD

A radar apparatus includes: a radar transmission signal generator, which in operation, outputs a plurality of radar signals; a switching controller, which in operation, switches among plurality of transmitting antennas in sequence in a determined order to every one radar signal transmission period; and a radio transmitter, which in operation, transmits one radar signal every one radar signal transmission period through a allocated transmitting antenna to which switching has been made. A plurality of transmission timings at which the allocated transmitting antennas to which switching have been made transmit each of the plurality of radar signals within a determined period have identical time differences from a reference timing within the determined period.

Способ радиолокации с изменением несущей частоты от импульса к импульсу

FIELD: radar ranging.SUBSTANCE: invention relates to the field of radar engineering and can be used in the construction of onboard pulsed incoherent radio altimeters. Method of radar ranging consists in generation of emitted signal by direct heterodyning down to intermediate frequency of input intrinsic noise of receiving device, amplification, its subsequent narrow-band filtering at intermediate frequency with a frequency-selective device to obtain quasi-harmonic noise of intermediate frequency, return heterodyne up noise from intermediate frequency to carrier, amplification, limiting amplitude from above, its amplitude-pulse manipulation, amplification to required level of emitted pulse power and subsequent radiation, wherein filtration of reflected signal, amplification and detection is carried out at intermediate frequency.EFFECT: wider range of measured ranges, low power consumption, low level of spurious signals and noise pick-up in power and control circuits.5 cl, 4 dwg РОССИЙСКАЯ ФЕДЕРАЦИЯ (19) RU (11) (13) 2 714 510 C1 (51) МПК G01S 13/24 (2006.01) ФЕДЕРАЛЬНАЯ СЛУЖБА ПО ИНТЕЛЛЕКТУАЛЬНОЙ СОБСТВЕННОСТИ (12) ОПИСАНИЕ ИЗОБРЕТЕНИЯ К ПАТЕНТУ (52) СПК G01S 13/24 (2019.08); G01S 13/12 (2019.08); G01S 13/22 (2019.08); G01S 13/227 (2019.08); G01S 13/30 (2019.08); G01S 13/34 (2019.08); G01S 13/32 (2019.08); G01S 13/70 (2019.08); G01S 7/292 (2019.08) (21)(22) Заявка: 2019121277, 04.07.2019 04.07.2019 Дата регистрации: 18.02.2020 2 7 1 4 5 1 0 R U Адрес для переписки: 607188, Нижегородская обл., г. Саров, пр. Мира, 37, ФГУП "РФЯЦ-ВНИИЭФ", зам. директора департамента инновационно-проектной деятельности и корпоративного управления начальнику УИСНТИ Миронову В.Е. (56) Список документов, цитированных в отчете о поиске: RU 2628526 C1, 18.08.2017. RU 2262122 C1, 10.10.2005. RU 2326402 C1, 10.06.2008. RU 2422851 C1, 27.06.2011. US 5162805 A, 10.11.1992. JP 2012078187 A, 19.04.2012. JP 5197125 B2, 15.05.2013. US 20070252751 A1, 01.11.2007. (54) Способ радиолокации с изменением ...

Antenne für eine hochauflösende Synthetik-Apertur-Radarvorrichtung

Die Erfindung betrifft eine Antenne für eine hochauflösende Synthetik-Apertur-Radarvorrichtung, umfassend zwei oder mehr Sendeantennen (TX1-TX3), die zum Aussenden jeweils eines Radarstrahls im Mikrowellenbereich ausgebildet sind, eine zum Empfangen von reflektierten Radarstrahlen im Mikrowellenbereich ausgebildete Empfangsantenne, die in Elevation mehrere Subaperturen (RX1-RX17) aufweist, die weniger als drei Azimutaperturen bilden.

RADAR TRANSMITTERS

... 1503370 Pulsed radar ENGLISH ELECTRIC VALVE CO Ltd 17 Aug 1976 [24 Oct 1975] 43703/75 Heading H4D A coherent pulsed radar comprising a magnetron 1 changeable from a first frequency to a second frequency by means of a multipactor tuning arrangement 2 as described in Specification 1,334,001, has the magnetron of the first frequency (arrangement 2 operative) at the beginning of each pulse and a phase comparator detecting phase equality between the first frequency, as tapped off at 7, and the output of a COHO 10, to cause, via 3, the disablement of arrangement 2 and change in the pulse to the second frequency. The latter, second frequency parts of the pulses are coherent with COHO 10. Slow frequency drift, pulse to pulse, is controlled by an A.F.C. system 8, 9, 11. The receiver gates out the first, first frequency non- coherent, part of each echo pulse.

Bathroom fixture using fluid interface radar sensor

Ambiguous radar range resolution using range lookup table

System and method for determining range to targets using an M-of-N range resolver includes transmitting multiple coherent processing interval (CPI) signals with different pulse repetition frequencies (PRFs) towards the targets, receiving and storing threshold hits from prior N-1 CPIs; converting the threshold hits from the current CPI and prior N-1 CPIs to range unfolded threshold hits; generating a lookup table of the plurality of range unfolded threshold hits from the prior N-1 CPIs; determining the number of the prior N-1 CPIs in which a range unfolded threshold hit from the current CPI has at least one range coincident range unfolded threshold hit from a prior CPI utilizing the lookup table; generating a range resolved threshold hit when the number is greater than or equal to M-1; accumulating range resolved threshold hits; and determining the range to the targets.

PULSE RADAR APPARATUS

Abstract Described is a pulse radar apparatus having a repetition period containing m wobbles. The pulse radar apparatus is provided with: a transmitting an receiving unit (2), whereby the received target echoes are sampled and digitised; an n-point DFT processing unit (3); a threshold circuit (4); and a cluster combiner circuit (5) comprising means to form a cluster covering one single target using the signals obtained from the threshold circuit (4). Due to the wobbles, additional information arises in the DFT spectra: From the range, azimuth, local maximum values of the DFT spectrum and the associated output channel number of the DFT processing unit (3), a classification unit (6) determines whether a target is a multiple-time-around target. The classification unit (6) is also able to determine the target doppler frequency, even if this frequency exceeds the average pulse reptition frequency.

PROCESS FOR ADAPTING THE POST INTEGRATION IN A SWITCHED PULSE REPETITION FREQUENCY RADAR AND A CIRCUIT IMPLEMENTING THIS PROCESS

WEATHER APPARATUS RADAR

Device for ambiguity resolution in radar pulse repetition rate switchable.

Improvements to pulsed Doppler radars

WEATHER APPARATUS RADAR

L'invention concerne un appareil radar météorologique. Dans cet appareil pour projeter signal impulsionnel de transmission constitué par une pluralité d'impulsions délivrées par une unité d'émission (3) en direction d'une cible au moyen d'une antenne (7) et calculer (en 13) la vitesse Doppler de la cible à partir d'un signal impulsionnel reçu (en 11) réfléchi par cette dernière, la vitesse Doppler d'une cible de référence (18) est calculée et l'instant d'émission du signal impulsionnel d'émission délivré par l'unité d'émission (3) est corrigé sur la base de la vitesse Doppler de la cible de référence de telle sorte que la vitesse Doppler de la cible de référence s'annule. Application notamment à l'observation de phénomènes météorologiques tels que des nuages, de la pluie et du brouillard.

Multi-color laser rangefinder for measuring distance of object, has emission device for emitting laser pulses of different wavelengths whose emission frequency is lesser than preset threshold frequency

The rangefinder has an emission device for emitting laser pulses of N different wavelengths, where N is an integer that is greater than one, and emission frequency for each wavelength is lesser than a preset threshold frequency. A detection device having an optical coupler (14) detects pulses reflected by a remote object, and an accumulating device accumulates the detected pulses. The emission device has a wideband amplifier (13) to amplify each of the emitted pulses, and emitters (10) e.g. laser diodes, each connected to an optical multiplexer (12) by an optical fiber (11).

BATHROOM FIXTURE USING FLUID INTERFACE RADAR SENSOR

Devices for controlling the flow of fluid in fixtures, such as kitchen fixtures and bathroom or restroom fixtures (hereinafter "bathroom fixtures") by sensing a fluid interface using a radar sensor and fixtures using such methods and devices are provided. A bathroom fixture, in accordance with one embodiment of the invention, includes a basin for holding fluid, a radar sensor for sensing an interface between the fluid and another material, and a controller included with or coupled to the radar sensor for controlling fluid flow of the bathroom fixture based on the sensed interface. The sensed interface may, for example, be an air-fluid interface associated with a fluid level of the fixture.

RADARVORRICHTUNG FÜR NIEDRIGE LEISTUNGSVERWENDUNGEN UND SANITÄRANLAGEN

Radar systems

A radar system for determining first time around targets from multiple time around targets using two radar pulse trains of different pulse repetition intervals (31) and thresholding means (35). Echos from pulses at each pulse repetition interval being compared (37) to determine first time around targets from subsequent time around targets. The radar system using thresholding levels to determine an echo and being less prone to problems of coincidence gate clashing with high duty cycles.

Echo measurement

Radar apparatus and signal processing method

This radar apparatus (1) is provided with: a PRI control unit (14) which sets multiple sets of pulse repetition cycles, each of the sets consisting of a pulse repetition cycle longer than a reference cycle and a pulse repetition cycle shorter than said reference cycle; a signal generation circuit (10) which generates a plurality of transmission pulse signals on the basis of said multiple sets of pulse repetition cycles; a transmission/reception unit (11) which sends out the plurality of transmission pulse signals to external space and receives a plurality of reflection wave signals from said external space; a reception circuit (13) which generates a plurality of reception signals by sampling each of the reflection wave signals; a domain conversion unit (40) which generates a plurality of frequency domain signals by performing domain-conversion, from time domain to frequency domain, on the reception signals; and a target detection unit (50) which detects target candidates on the basis of ...

AN ULTRA WIDE BAND COHERENT RADAR SYSTEM OPTIMISING THE RADIO INTERFERENCE DISCRIMINATION CAPABILITY

The present invention relates to an ultra wide band coherent radar system assessing the Doppler shift of the returned radar echoes, which radar system optimises the radio interference discrimination capability. The radar system comprises a control unit by which the transmit-receive process is partitioned into a number of consecutive sub-processes each of which consists of transmission followed by reception of a signal having a relative bandwidth of a fraction of an octave and where the received signals from the different narrow band transmissions are used to reconstruct broad band radar data by pulse compression techniques. Further, the control unit is arranged to determine the recurrence time, i.e. the time lapse between two consecutive transmissions, of a narrow band signal for a certain frequency step to be approximately inversely proportional to the frequency of this step and higher or equal to the Nyquist rate with respect to the Doppler bandwidth at this frequency.

Almost real-time sampling for ground-penetrating radar impulses

A ground-penetrating RADAR-based system can include a transmitter configured to transmit multiple RADAR impulses and a receiver configured to receive a signal comprising return waves generated responsive to the transmitted RADAR impulses. The signal can include a direct wave portion and a reflected wave portion. The system can also include a processing unit configured to analyze the return waves by determining the direct wave portion, fitting the direct wave portion to determine parametric information corresponding to the return waves, determining the reflected wave portion, determining characteristics of the reflected wave portion based on the parametric information, and comparing the determined characteristics against known characteristics.

RADAR APPARATUS

Transmission radars (1-n) (n=1, 2, . . . , N) generate mutually different modulation codes Code(n, h) by cyclically shifting the same code sequence by mutually different cyclic shift amounts Δτ(n), and generate mutually different transmission RF signals (4-n) using the mutually different modulation codes Code(n, h). As a result, the number of transmission radars 1-ncan be made larger, and target detection accuracy can be made higher than in a case where orthogonal codes are used as mutually different modulation codes. 19.-. (canceled)11. The radar apparatus according to claim 10 , wherein the signal processor includes an integrator which integrates the signal subjected to the code demodulation performed by the code demodulator claim 10 , and outputs the integrated signal to the target detector.12. The radar apparatus according to claim 11 , wherein the integrator includes a first integrator which coherently integrates the signal subjected to the code demodulation performed by the code demodulator claim 11 , by performing hit-direction complex integration on the signal subjected to the code demodulation.13. The radar apparatus according to claim 12 , wherein the integrator includes a second integrator which integrates the signal integrated by the first integrator claim 12 , on a basis of positions of the plurality of transmission radars claim 12 , a position of the reception radar claim 12 , and an assumed value of an angle with the target.14. The radar apparatus according to claim 11 , wherein the integrator includes a first integrator coherently integrates the signal subjected to the code demodulation performed by the code demodulator claim 11 , by performing hit-direction Fourier Transform on the signal subjected to the code demodulation.15. The radar apparatus according to claim 14 , wherein the integrator includes a second integrator which integrates the signal integrated by the first integrator claim 14 , on a basis of positions of the plurality of transmission ...

Angle of arrival (aoa) positioning method and system for positional finding and tracking objects using reduced attenuation rf technology

Systems and methods for determining user equipment (UE) locations within a wireless network using reference signals of the wireless network are described. The disclosed systems and methods utilize a plurality of in-phase and quadrature (I/Q) samples generated from signals provided by receive channels associated with two or more antennas of the wireless system. Based on received reference signal parameters the reference signal within the signals from each receive channel among the receive channels is identified. Based on the identified reference signal from each receive channel, an angle of arrival between a baseline of the two or more antennas and incident energy from the UE to the two or more antennas is determined. That angle of arrival is then used to calculate the location of the UE. The angle of arrival may be a horizontal angle of arrival and/or a vertical angle of arrival

ANGLE OF ARRIVAL (AOA) POSITIONING METHOD AND SYSTEM FOR POSITIONAL FINDING AND TRACKING OBJECTS USING REDUCED ATTENUATION RF TECHNOLOGY

Systems and methods for determining user equipment (UE) locations within a wireless network using reference signals of the wireless network are described. The disclosed systems and methods utilize a plurality of in-phase and quadrature (I/Q) samples generated from signals provided by receive channels associated with two or more antennas of the wireless system. Based on received reference signal parameters the reference signal within the signals from each receive channel among the receive channels is identified. Based on the identified reference signal from each receive channel, an angle of arrival between a baseline of the two or more antennas and incident energy from the UE to the two or more antennas is determined. That angle of arrival is then used to calculate the location of the UE. The angle of arrival may be a horizontal angle of arrival and/or a vertical angle of arrival 1. A method for determining an elevation of a user equipment (UE) in communication with a wireless system , the method comprising:buffering a plurality of in-phase and quadrature (I/Q) samples generated from signals provided by receive channels associated with at least two antennas, wherein a first antenna among the at least two antennas is displaced in a vertical direction with respect to a second antenna among the at least two antennas;identifying the signals from each receive channel among the receive channels as previously known signals based on the buffered I/Q samples;based on the previously known signals from each receive channel, determining an angle of arrival between a baseline of the at least two antennas and incident energy from the UE to at least two antennas; andutilizing the angle of arrival to calculate the elevation of the UE.2. The method of claim 1 , wherein the at least two antennas are antenna elements of an antenna array.3. The method of claim 2 , wherein the antenna elements are located in a single antenna enclosure in a sector.4. The method of claim 2 , wherein the ...

ANGLE OF ARRIVAL (AOA) POSITIONING METHOD AND SYSTEM FOR POSITIONAL FINDING AND TRACKING OBJECTS USING REDUCED ATTENUATION RF TECHNOLOGY

Systems and methods for determining user equipment (UE) locations within a wireless network using reference signals of the wireless network are described. The disclosed systems and methods utilize a plurality of in-phase and quadrature (I/Q) samples generated from signals provided by receive channels associated with two or more antennas of the wireless system. Based on received reference signal parameters the reference signal within the signals from each receive channel among the receive channels is identified. Based on the identified reference signal from each receive channel, an angle of arrival between a baseline of the two or more antennas and incident energy from the UE to the two or more antennas is determined. That angle of arrival is then used to calculate the location of the UE. The angle of arrival may be a horizontal angle of arrival and/or a vertical angle of arrival 1. A method for determining a position of a user equipment (UE) in communication with a wireless system , the method comprising:buffering a plurality of in-phase and quadrature (I/Q) samples generated from signals provided by receive channels associated with a plurality of antennas in at least one antenna enclosure, wherein each antenna among the plurality of antennas is displaced in one or more of a vertical direction and a horizontal direction with respect to other antennas among the plurality of antennas;identifying the signals from each receive channel among the receive channels as previously known signals based on the buffered I/Q samples;based on the previously known signals from each receive channel, determining an angle of arrival between a baseline of the plurality of antennas and incident energy from the UE to the plurality of antennas; andutilizing the angle of arrival to calculate the position of the UE.2. The method of claim 1 , wherein the antenna enclosure is an antenna array.3. The method of claim 2 , wherein antenna elements of the antenna enclosure are located in a single ...

APPARATUS AND METHOD FOR RF INTERFERENCE AVOIDANCE IN AN AUTOMOTIVE DETECTION SYSTEM

A method of mitigates RF interference from an RF interferer. An RF signal is received at an RF transceiver during a time period. The RF signal that includes, for at least a portion of the time period, an interference signal having a cyclic transmission pattern with at least one deterministic feature. The received RF signal is analyzed in order to determine timing information for the at least one deterministic feature and the associated interference signal cyclic transmission pattern. Transmission of the RF signals from the RF transceiver are synchronized with the interference signal transmission pattern based on the determined timing information to mitigate interference between the RF signals and the interference signal. 1. A method of mitigating RF interference from an RF interferer , comprising:receiving at an RF transceiver during a time period an RF signal that includes, for at least a portion of the time period, an interference signal having a cyclic transmission pattern with at least one deterministic feature;analyzing the received RF signal in order to determine timing information for the at least one deterministic feature and the associated interference signal cyclic transmission pattern; andsynchronizing transmission of RF signals from the RF transceiver with the interference signal transmission pattern based on the determined timing information to mitigate interference between the RF signals and the interference signal.2. The method of claim 1 , wherein the interference signal comprises a direct wave from an interferer RF transceiver.3. The method of claim 2 , wherein the receiving RF transceiver and the interferer RF transceiver transmit in the same frequency band.4. The method of claim 1 , wherein analyzing the received RF signal comprises:measuring the power envelope of the received RF signal to identify the at least one deterministic feature and timing information associated therewith; andcomparing the identified at least one deterministic feature and ...

METHOD FOR MEASURING A TIME OF FLIGHT

A method of measuring the phase of a response signal relative to a periodic excitation signal, comprises the steps of producing for each cycle of the response signal two transitions synchronized to a clock and framing a reference point of the cycle; swapping the two transitions to confront them in turns to the cycles of the response signal; measuring the offsets of the confronted transitions relative to the respective reference points of the cycles; performing a delta-sigma modulation of the swapping rate of the two transitions based on the successive offsets; and producing a phase measurement based on the duty cycle of the swapping rate. 1. A method of determining a phase offset of a series of burst pulses relative to a periodic generator signal , the method comprising:selecting a first half-wave signal from a plurality of half-wave signals as a selected half-wave signal for a first burst of the series of burst pulses;determining, as a first count, a number of pulses occurring in the first burst and before a transition of the selected half-wave signal;determining, as a second count, a number of pulses occurring in the first burst and after the transition of the selected half-wave signal;determining a difference between the first count and the second count for the first burst;repeating determination of the first count, the second count, and the difference between the first count and the second count using the first half-wave signal for successive bursts of the series of burst pulses that follow the first burst;integrating the differences between the first count and the second count determined for the first burst and the successive bursts until an integral value reaches a first threshold;selecting a second half-wave signal from the plurality of half-wave signals as the selected half-wave signal in response to the integral value reaching the first threshold;determining the difference between the first count and the second count, based on the second half-wave signal, ...

RADAR DEVICE AND TARGET DETECTION METHOD FOR RADAR DEVICE

[OBJECT] To surely remove a multi-order echo or interference from another radar apparatus 1. A radar apparatus transmitting pulse signals at predetermined repetition cycles and receiving and analyzing the pulse signals reflected by a target object to thereby detect the target object , the radar apparatus comprising:a setting means setting so that at least a part of the repetition cycles of the pulse signals is different;a detection means detecting a distance to the target object specified by the pulse signal; anda removal means removing the target object as an interference wave from another radar apparatus or clutter when the distance to the target object detected in the different repetition cycle or in a period subsequent to the different repetition cycle by the detection means and the distance to the target object detected in the period other than that by the detection means are different.2. The radar apparatus according to claim 1 , whereinthe setting means sets so that at least a part of the repetition cycles of the pulse signals is different and so that a sampling cycle at a time of sampling the pulse signal is constant, andthe removal means removes the target object as the clutter when the distance to the target object detected in the period subsequent to the different repetition cycle by the detection means and the distance to the target object detected in the period other than that by the detection means are different.3. The radar apparatus according to claim 2 , whereinthe setting means sets so that all the repetition cycles of the plurality of pulse signals existing in the sampling cycle are different.4. The radar apparatus according to claim 2 , whereinthe setting means sets the repetition cycles with a unit being the pulse signals continuing a predetermined times at the same repetition cycles, and sets so that the repetition cycle of at least a part of unit among the plurality of units is different.5. The radar apparatus according to any one of to claim ...

Single-beam radar level and velocity sensing

An embodiment provides a method for measuring velocity and depth of fluid flow in a channel, including: transmitting, using a transmitter, directed energy comprising a single energy beam slant-wise toward a surface of a fluid in a fluid channel producing a plurality of reflections, wherein the transmitting comprises modulating a frequency associated with the single energy beam; detecting, at a receiver, received signals from the plurality of reflections; and determining, based upon differences between parameters of the transmitted single energy beam and parameters of the received signals, the velocity of the fluid and the depth of the fluid. Other embodiments are described and claimed.

Power-Splitter-Based Virtual Array

During operation, a transmitter in an electronic device may provide, to a transmission path, an electrical signal. This electrical signal may be divided by the power splitter into a first output electrical signal in a first output transmission path and a second output electrical signal in a second output transmission path, which may result in transmitting of the first wireless signal and the second wireless signal by antennas. Because the second output transmission path may include a delay element that provides a delay, the second wireless signal may be delayed relative to the first wireless signal. Moreover, N radar receivers in the electronic device may receive first wireless-return signals corresponding to the first wireless signal and second wireless-return signals corresponding to the second wireless signal. These wireless-return signals may be combined to create a virtual array MIMO radar having an antenna aperture size of 2N. 1. An electronic device , comprising:a radar transmitter; and provide, from the radar transmitter, an electrical signal to the transmission path in the transmission circuit;', 'divide, using the power splitter, the electrical signal into a first output electrical signal in the first output transmission path and a second output electrical signal in the second output transmission path;', 'transmit, from the first antenna, a first wireless signal corresponding to the first output electrical signal; and', 'transmit, from the second antenna, a second wireless signal corresponding to the second output electrical signal., 'a transmission circuit communicatively coupled to the radar transmitter, wherein the transmission circuit comprises a transmission path that is divided by a power splitter into a first output transmission path and a second output transmission path, wherein the second output transmission path comprises a delay element configured to provide a delay period, wherein the first output transmission path is communicatively coupled to ...

ANGLE OF ARRIVAL (AOA) POSITIONING METHOD AND SYSTEM FOR POSITIONAL FINDING AND TRACKING OBJECTS USING REDUCED ATTENUATION RF TECHNOLOGY

Systems and methods for determining user equipment (UE) locations within a wireless network using reference signals of the wireless network are described. The disclosed systems and methods utilize a plurality of in-phase and quadrature (I/Q) samples generated from signals provided by receive channels associated with two or more antennas of the wireless system. Based on received reference signal parameters the reference signal within the signals from each receive channel among the receive channels is identified. Based on the identified reference signal from each receive channel, an angle of arrival between a baseline of the two or more antennas and incident energy from the UE to the two or more antennas is determined. That angle of arrival is then used to calculate the location of the UE. The angle of arrival may be a horizontal angle of arrival and/or a vertical angle of arrival 1. A method for determining an elevation of a user equipment (UE) in communication with a wireless system , the method comprising:buffering a plurality of in-phase and quadrature (I/Q) samples generated from signals provided by receive channels associated with at least two antennas or four or more omnidirectional antennas, wherein a first antenna among the at least two antennas or the four or more omnidirectional antennas is displaced in a vertical direction with respect to a second antenna among the at least two antennas or other antennas among the four or more omnidirectional antennas;identifying the signals from each receive channel among the receive channels as previously known signals based on the buffered I/Q samples;based on the previously known signals from each receive channel determining an angle of arrival between a baseline of the at least two antennas or the four or more omnidirectional antennas and incident energy from the UE to at least two antennas or the four or more omnidirectional antennas, wherein determining the angle of arrival includes determining a sub-sample ...

Pulse signal setting device, radar apparatus, method and program of setting pulse signal

A radar apparatus using a pulse pair method to quickly measure a relative speed of an object. The radar apparatus includes: A data acquirer that acquires data relating to a pulse width, a repetition frequency, and a highest staggered ratio; A staggered pattern output unit that outputs a specific staggered pattern in which a total of phase changes within a sweep range of the target of the pulse pairing can be approximated to zero, wherein each phase change is caused by the pulse pairing on a target object at a constant speed due to a difference between an average transmission interval and a transmission interval between transmissions within the sweep range; And a setter that sets the transmission interval of a pulse signal by using the pulse width, the repetition frequency, the highest staggered ratio, and the specific staggered pattern.

Systems and methods for detecting physiological information using multi-modal sensors

A micro impulse radar (MIR) system includes a first sensor, a second sensor, and a control circuit. The first sensor includes a micro impulse radar (MIR) sensor configured to receive a plurality of radar returns corresponding to an MIR radar signal transmitted towards a subject. The second sensor is configured to detect sensor data regarding the subject. The control circuit is configured to calculate a physiological parameter of the subject based on the plurality of radar returns and the sensor data.

METHOD FOR MEASURING A TIME OF FLIGHT

A method of measuring the phase of a response signal relative to a periodic excitation signal, comprises the steps of producing for each cycle of the response signal two transitions synchronized to a clock and framing a reference point of the cycle; swapping the two transitions to confront them in turns to the cycles of the response signal; measuring the offsets of the confronted transitions relative to the respective reference points of the cycles; performing a delta-sigma modulation of the swapping rate of the two transitions based on the successive offsets; and producing a phase measurement based on the duty cycle of the swapping rate. 1. A digital circuit for determining a phase offset of a series of burst pulses relative to a periodic generator signal , the digital circuit comprising:a shift register configured to generate a plurality of half-wave signals, wherein each of the plurality of half-wave signals is time delayed relative to a reference half-wave signal, and wherein respective delays of the plurality of half-wave signals are different;a selection circuit configured to select one of a first half-wave signal or a second half-wave signal from the plurality of half-wave signals as a selected half-wave signal in response to a control signal received by the selection circuit;a plurality of counters configured to determine a number of pulses occurring before and after a transition of the selected half-wave signal for each burst of the series of burst pulses;a phase comparator configured to determine a difference between the number of pulses occurring before and after the transition of the selected half-wave signal for each burst of the series of burst pulses;an integrator configured to integrate successive difference between the number of pulses occurring before and after the transition of the selected half-wave signal until an integral value reaches a threshold;a control circuit configured to change a value of the control signal in response to the integral ...

TARGET DETECTION DEVICE AND TARGET DETECTION METHOD

Target detection units respectively performing detection processing of targets which are different in spatial extent from each other on the basis of a detection result of amplitude or power by a detection unit are provided, and at least one determination processing unit is configured to determine presence or absence of targets from a result of the detection processing of targets by the target detection units. As a result of this configuration, it is possible to detect a target even when it has a spatial extent. 1. A target detection device comprising: processing circuitry:to detect, by a detector, amplitude or power of a received signal of an electromagnetic wave reflected by a target;to perform, by a plurality of target detectors, respectively, detection processing of targets which are different in spatial extent from each other on a basis of a detection result of the amplitude or power by the detector unit; andto determine, by at least one determination processor, presence or absence of a target from a result of the detection processing of targets obtained by the plurality of target detectors,wherein weight values each corresponding to a spatial extent of a detectable target is set for the plurality of target detectors, respectively, andthe at least one determination processor determines presence or absence of a target by calculating, for the plurality of target detectors, multiplication values of the weight values set for the plurality of target detectors and detection values each indicating the result of the detection processing of a target by each of the plurality of target detectors, respectively, and by comparing a sum of the multiplication values of the weight values and the detection values of the plurality of target detectors and a target determination threshold.2. (canceled)3. The target detection device according to claim 1 , wherein each of the plurality of target detectors perform constant false alarm rate processing as the detection processing of a ...

Method of Processing A Signal Formed of A Sequence of Pulses

A method for processing a signal formed of a sequence of pulses, including at least one repetitive pattern formed of at least one pulse, the pattern being repeated in the signal with a pattern repetition period, the method including estimating the pattern repetition period of the signal and calculating, as a function of (i) an arrival date of each pulse with respect to a chosen reference arrival date, and (ii) the estimated pattern repetition period, a sequence of phases; thereafter, the method includes estimating, on the basis of the calculated sequence of phases, at least one phase value and an associated standard deviation, the phase value being associated with a phase moment representative of the repetitive pattern, and obtaining and utilizing parameters characterizing the digital signal by using the estimated phase values. 1. A method for processing a signal formed of a sequence of pulses , comprising at least one repeating pattern formed of at least one pulse , the pattern being repeated in the signal with a pattern repetition period , the method comprising:estimating the pattern repetition period of said signal;calculating a sequence of phases as a function of an arrival date of each pulse relative to a chosen reference arrival date and of the estimated pattern repetition period;from said calculated sequence of phases, estimating at least one phase value and an associated standard deviation, the phase value being associated with a phase moment representative of the repetitive pattern; andobtaining and exploiting characterization parameters of the signal by using the estimated phase values.2. The method according to claim 1 , comprising claim 1 , after said calculating a sequence of phases:building a histogram of phases; andextracting one or several peak(s) from the histogram, each peak being associated with a phase moment of the sequence of pulses.3. The method according to claim 2 , wherein said estimating a phase associated with a moment of the sequence of ...

RADAR LEVEL GAUGING

Method for determining product surface distance in a tank comprising: 1. A method for determining a distance to a surface of a product in a tank based on a time delay of electromagnetic signals propagating between a predefined reference and a surface of said product , said method comprising the steps of:{'b': '5', 'i) generating a transmission signal in the form of a first pulse train having a predetermined pulse repetition frequency, said first pulse train comprising at least pulses having a constant pulse repetition frequency;'}ii) generating a reference signal in the form of a second pulse train by generating a predefined and fixed time delay between said first and second pulse trains relative each other;wherein each pulse in said first and second pulse trains have essentially identical waveforms;iii) guiding said transmission signal into the tank as electromagnetic signals, and allowing said signals to propagate towards said surface;iv) receiving a reflected signal reflected from the tank;v) forming a correlation value based on a time correlation between a pulse of the reference signal and the reflected signal, and storing said correlation value and the associated pulse repetition frequency;vi) carrying out steps i) to v) in sequence for at least three different pulse repetition frequencies, until at least three pairs of correlation values and associated pulse repetition frequencies have been stored;vii) determining said distance based on said at least three pairs of correlation values and associated pulse repetition frequencies, and said fixed time delay between the reference signal and the transmission signal.2. The method according to claim 1 , wherein in step vi) the carrying out of steps i) to v) are performed a predetermined number of times.3. The method according to claim 1 , wherein in step vi) the carrying out of steps i) and v) are performed until a maxima for the time correlation between the transmission signal and the reference signal has been ...

ECHO MEASUREMENT

An echo measurement system transmits a transmitted-signal which is modulated over a period of time corresponding to a modulation duration. The modulation could be, for example, modulation to represent a coded signal. A transducer (), which may be common between transmission and reception, receives a received-signal which is cross-correlated with the transmitted-signal. The transmitted-signal comprises a plurality of transmission periods separated by a plurality of transmission pauses. The modulation duration extends over two or more of the transmission periods and the duration of the transmission pauses is varied within a range of transmission pause duration. The technique seeks to improve the signal-to-noise ratio without imposing undesirable other constraints. 1. A method of echo measurement comprising:transmitting a transmitted-signal modulated over a modulation duration;receiving a received-signal; andcross correlating said received-signal with said transmitted-signal, whereinsaid transmitting comprises a plurality of transmission periods separated by a plurality of transmission pauses;said modulation duration extends over two or more of said plurality of transmission periods; andduration of said transmission pauses is varied within a range of transmission pause duration.2. A method as claimed in claim 1 , wherein said cross correlating determines a waveform from which are extracted one or more of:a time of flight of said received-signal;an amplitude of said received-signal; anda phase of said received-signal.3. A method as claimed in claim 1 , wherein said duration of said transmission pauses is varied within said range of transmission pause duration such that at least one of said transmission pauses includes a time corresponding to a time of receipt of a received-signal of any given time of flight within a measured range of time of flight.4. A method as claimed in claim 3 , wherein said modulation duration is greater than a minimum within said measured range ...

Method and device for measuring a distance to a target in a multi-user environment by means of at least one detector

A method for measuring a distance to a target in a multi-user environment by means of at least one sensor, comprising: irradiating the environment by means of a series of radiation pulses, wherein series of radiation pulses are emitted at a determined repetition rate and with a determined random delay; collecting pulses that are reflected or scattered from the environment to at least a detector connected to at least one chronometer; assigning a timestamp at every detected pulse on the detector; subtracting the added delay from every registered timestamp coming from the chronometer, the result corresponding to the time of arrival; determining the statistical distribution of said time of arrival; determining the distance to the target from said statistical distribution.

ADAPTIVE PULSE TRAIN LAYOUT

A RADAR control apparatus includes a range identifier configured to identify a scan range that is a radial distance from the range identifier, and a control unit configured to receive the scan range and cause a RADAR pulse generation unit to emit a RADAR pulse train that is a pattern of RADAR pulse waves including: a type of RADAR pulse wave; a number of each type of RADAR pulse wave; a RADAR pulse wave duration or RADAR pulse wave width; a RADAR pulse wave amplitude; a temporal spacing between each RADAR pulse wave; a sequential order for the type and the number of RADAR pulse waves; and/or at least one sector of space surrounding the RADAR pulse generation unit through which the RADAR pulse waves will propagate. The control unit is configured to continuously adapt the pattern of RADAR pulses in accordance with the received scan range. 1. A RADAR control apparatus , comprising:a range identifier configured to identify a scan range, the scan range being a radial distance from the range identifier; anda control unit configured to receive the scan range from the range identifier and cause a RADAR pulse generation unit to emit a RADAR pulse train that will be a pattern of RADAR pulse waves, the pattern of RADAR pulse waves including a type of RADAR pulse wave and a temporal spacing between each RADAR pulse wave;wherein the control unit is configured to continuously adapt the pattern of RADAR pulse waves by adjusting the type of RADAR pulse wave and the temporal spacing between each RADAR pulse wave in accordance with the received scan range.2. The RADAR control apparatus recited in claim 1 , wherein:the pattern of RADAR pulse waves will include any one or combination of: the type of RADAR pulse wave; a number of each type of RADAR pulse wave; a RADAR pulse wave duration or RADAR pulse wave width; a RADAR pulse wave amplitude; the temporal spacing between each RADAR pulse wave; a sequential order for the type and the number of RADAR pulse waves; or at least one sector ...

MULTI-PATH MITIGATION IN TRACKING OBJECTS USING A DISTRIBUTED ANTENNA SYSTEM

An autonomous system with no Customer Network Investment is described, wherein the system is configurable to operate on in a band in addition to the LTE band. Such system allows the definition of hybrid operations to accommodate the positioning reference signals (PRS) of LTE and already existing reference signals. The system can operate with PRS, with other reference signals such as cell-specific reference signals (CRS), or with both signal types. As such, the system provides the advantage of allowing network operator(s) to dynamically choose between modes of operation depending on circumstances, such as network throughput and compatibility. The system further enables information collected at a network device to be processed at a locate server without involving any processing at the network device. 1. A method for identifying antennas in a network comprising a plurality of wireless network nodes , wherein each wireless network node includes a single node antenna , comprising:receiving information at a locate server unit collected at a wireless network device in communication with the network, wherein the wireless network device includes a single device antenna, wherein the collected information includes a plurality of copies of a signal transmitted from each node antenna of the plurality of wireless network nodes, wherein each of the plurality of copies of the transmitted signal has a different time offset; andwithout processing the collected information for location purposes at the wireless network device, calculating at the locate server unit a geometric relationship between the wireless network device and each node antenna of the plurality of wireless network nodes based on the collected information.2. The method of claim 1 , wherein each node antenna is placed at a known location.3. The method of claim 1 , wherein a timing offset of each node antenna is known.4. The method of claim 1 , wherein the single device antenna is within receiving range of at least two ...

Conical scan weather radar

A new measurement approach is disclosed that facilitates significantly smaller size, weight, and power (SWaP) spaceborne radar systems that can provide wide swath, high resolution observations. Multiple beams employed in the scan and the complex volume and/or surface backscatter signals of each beam is recorded. Each beam is electronically swept in azimuth where each beam is held at a constant incidence angle over the azimuth sector that covers the swath. Once the sweep is complete, the platform moves forward, by one along track pixel, and the sweep is repeated in order to provide continuous mapping of the volume and surface covered by the swath. Complex volume backscatter is recorded and mapped to each altitude layer to provide full mapping of the atmosphere.

RADAR APPARATUS AND METHOD FOR AVOIDING RADIO INTERFERENCE

According to one embodiment, a radar apparatus includes a signal processing device that has a first circuit, a second circuit and a transmitter. The first circuit is configured to determine whether or not there is a radio interference based on a radio signal received via an antenna. The second circuit is configured to, when the first circuit determines that there is the radio interference, select a predetermined pulse pattern based on an avoiding function of a wireless communication device having the avoiding function of the radio interference, the predetermined pulse pattern being separately defined from a pulse pattern of transmission processing for operating a radar. The transmitter is configured to transmit from the antenna a radio signal matching the pulse pattern selected by the second circuit. 1. A radar apparatus comprising:a first circuit configured to determine whether or not there is a radio interference based on a radio signal received via an antenna;a second circuit configured to, when the first circuit determines that there is the radio interference, select a predetermined pulse pattern based on an avoiding function of a wireless communication device having the avoiding function of the radio interference, the predetermined pulse pattern being separately defined from a pulse pattern of transmission processing for operating a radar; anda transmitter configured to transmit from the antenna a radio signal matching the pulse pattern selected by the second circuit.2. The radar apparatus according to claim 1 , further comprising a third circuit configured to claim 1 , when the first circuit determines that there is not the radio interference after the radio signal matching the pulse pattern transmitted by the transmitter is transmitted claim 1 , set the pulse pattern as a valid pulse pattern on the avoiding function of the radio interference.3. The radar apparatus according to claim 2 , wherein the transmitter transmits the radio signal matching the valid ...

REMOTE SENSING BY PERIODICALLY INHIBITED PULSE SIGNALS

In an emission process for remote sensing, pulse signals () are periodically produced in elementary time windows spaced one pulse period (T) apart, and waves corresponding to those signals are emitted towards remote objects, so as to enable to monitor waves transmitted by those objects upon receiving the emitted waves. The emission of those waves is periodically prevented, according to at least one inhibition period (3T, 5T) proportional to the pulse period and equal to at least three times that pulse period. Parameters are set, suited to producing measurement information on the objects from the wave monitoring, based on at least part of a frequency content of the transmitted waves to which the pulse and inhibition periods contribute. Applications to lidars, radars, active sonars and ultrasound monitoring. 2. An emission device according to claim 1 , wherein said at least one inhibition system is configured so that said at least one inhibition period includes at least two distinct inhibition periods claim 1 , none of said distinct inhibition periods being a multiple of any other of said distinct inhibition periods.3. An emission device according to claim 2 , wherein said at least one inhibition system is configured so that said distinct inhibition periods have ratios with respect to the pulse period which are pairwise coprime.4. An emission device according to claim 1 , wherein said waves emitted by said emission device are unmodulated over each of said pulse signals.5. An emission device according to claim 1 , wherein said elementary time windows having a pulse duration claim 1 , said emission device is configured so that said waves emitted by said emission device comprise at least one modulation at a frequency higher than the reciprocal of said pulse duration.6. An emission device according to claim 1 , wherein said at least one inhibition system is adapted to cooperate with said pulse generator so that said pulse signals are truncated according to said at least ...

METHOD FOR DETERMINING THE FILL LEVEL OF A FILL SUBSTANCE LOCATED IN A CONTAINER

A method for determining the fill level of a fill substance located in a container. The method, which is based on the pulse travel time principle, is distinguished by the fact that extra-range echos can be recognized. For this, the method includes two method portions, in which microwave pulses are transmitted in the direction of the surface of the fill substance with different repetition rates in measuring cycles following one after the other. In each method portion, travel times are ascertained. The fill level is ascertained based on the first travel time and/or based on the second travel time, to the extent that they approximately agree. Otherwise, it is assumed that such echo pulses concern extra-range echos. Thus, by means of the method of the invention, it can be assured for pulse radar-based fill-level measurements that extra-range echos do not result in erroneous fill level values. 17-. (canceled)8. A method for determining fill level of a fill substance located in a container , comprising the steps as follows:in a first method step with a first repetition rate in measuring cycles following one after the other,a first microwave pulse with a first center frequency is transmitted in the direction of the surface of the fill substance,after transmitting the first microwave pulse, at least one first echo pulse received,wherein a first travel time between transmission of the first microwave pulse and receipt of the at least one first echo pulse is ascertained; and,in a second method step with a second repetition rate in measuring cycles following one after the other,a second microwave pulse with a second center frequency is transmitted in the direction of the surface of the fill substance,after transmitting the second microwave pulse, at least one second echo pulse is received,wherein a second travel time between transmission of the second microwave pulse and receipt of the at least one second echo pulse is ascertained,wherein, to the extent that said first travel ...

Radar system and computer-implemented method for radar target detection

A computer-implemented method for radar target detection and radar systems includes executing via one or more processors: transmitting a signal from transmit antennas to receive antennas, each transmit antenna configured to alternately transmit at first and second pulse repetition frequencies, each frame of the signal including sub-frames, each sub-frame including pulses from the transmit antennas in a staggered arrangement; performing range compression on the pulses in each frame to generate range cells; performing Doppler processing on each range cell to generate range-Doppler (RD) maps for the transmit antennas; integrating the RD maps to generate an integrated RD map; detecting presence of a target from the integrated RD map; estimating range and velocity of the detected target; estimating direction-of-arrival (DOA) of the detected target; and generating a point cloud of the detected target by computing Cartesian coordinates of the detected target from the range and the DOA of the detected target.

Pulse doppler radar range & velocity measurements

Systems and methods are disclosed to determine an unambiguous radial velocity for weather phenomena using weather radar that is not limited by the Doppler Dilemma. Some embodiments include transmitting a complex waveform and using the returned electromagnetic signal to determine the unambiguous radial velocity.

ULTRA-WIDEBAND COMMUNICATION SYSTEM

In an ultra-wideband (“UWB”) communication system, methods are disclosed for transmitting packets in multiple portions, each having a different pulse repetition frequency (“PRF”). Methods are also disclosed for transmitting packets dis-continuously. 1. A method for use in an ultra-wideband communication system for transmitting a packet comprising first and second portions , the method comprising configuring a transmitter facility of the system to perform the steps of:transmitting the first portion of the packet at a selected first pulse repetition frequency (“PRF”); andtransmitting the second portion of the packet at a selected second PRF different from the first PRF.2. The method of : a preamble;', 'a physical header (“PHR”);', 'a data payload; and', 'a cipher; and, 'wherein the first portion of the packet comprises at least a selected one of the PHR;', 'the data payload; and', 'the cipher., 'wherein the second portion of the packet comprises at least a selected one of3. The method of wherein the composition of at least the first portion of the packet is pre-defined.4. The method of :wherein the first portion of the packet is further characterized as comprising a synchronization sequence of a selected one of a plurality of preamble symbols; andwherein the PRF is selected as a function of the selected preamble symbol.5. The method of :wherein the first portion of the packet is further characterized as comprising a synchronization sequence of a selected one of a plurality of preamble symbols; andwherein the length of the preamble symbol is selected to increase the carrier recovery update rate.6. The method of :wherein the second portion of the packet is further characterized as comprising the data payload; andwherein the PRF is selected to reduce the transmission duration of the data payload.7. The method of :wherein the second portion of the packet is further characterized as comprising the data payload; andwherein the PRF is selected to increase the energy per bit ...

PRF Frequency Generator for a Fill Level Measuring Device

The invention relates to a frequency generator for generating two pulse repetition frequency signals with slightly different frequencies for a radar measuring device. The frequency generator comprises an oscillator, which generates an oscillator signal, a first signal path for generating a first pulse repetition frequency signal from the oscillator signal, and a second signal path for generating a second pulse repetition frequency signal from the oscillator signal. The first signal path comprises a frequency divider or a first DDS module which is designed to generate a first frequency signal on the basis of the oscillator signal, a first mixer which is designed to upmix the first frequency signal or a signal derived therefrom to an intermediate frequency band and to generate a first intermediate frequency signal, and a first ceramic bandpass filter which is designed to filter out a selected frequency component of the first intermediate frequency signal and to generate a bandpass-filtered first intermediate frequency signal. The second signal path comprises a second DDS component which is designed to generate a second frequency signal on the basis of the oscillator signal, said second frequency signal differing from the first frequency signal by a specified frequency offset, a second mixer which is designed to upmix the second frequency signal or a signal derived therefrom to an intermediate frequency band and to generate a second intermediate frequency signal, and a second ceramic bandpass filter which is designed to filter out a selected frequency component of the second intermediate frequency signal and to generate a bandpass-filtered second intermediate frequency signal. 1400. Frequency generator for generating two pulse repetition frequency signals with slightly different frequencies for a radar measuring device that functions according to the pulse correlation principle , wherein the frequency generator has: an oscillator () that generates an oscillator signal ...

RADAR DEVICE AND RADAR IMAGE DISPLAY METHOD

A radar device comprises a transmitter, a receiver, a first radar image production component, a second radar image production component, a display component, and an echo width adjuster. The transmitter transmits a pulse signal. The receiver receives an echo signal during a transmission and reception period of the pulse signal. The first radar image production component produces a radar image of a first display range on the basis of the echo signal. The second radar image production component produces a radar image of a second display range that is wider than the first display range on the basis of the echo signal. The display component selectively or simultaneously displays the radar image of the first display range and the radar image of the second display range. The echo width adjuster adjusts pulse width of echo included in the radar images or the echo signal according to the display range of the radar image. 1. A radar device comprising:a transmitter configured to transmit a pulse signal;a receiver configured to receive an echo signal during a transmission and reception period of the pulse signal;a first radar image production component configured to produce a radar image of a first display range on the basis of the echo signal;a second radar image production component configured to produce a radar image of a second display range that is wider than the first display range on the basis of the echo signal;a display component configured to selectively or simultaneously display the radar image of the first display range and the radar image of the second display range; andan echo width adjuster configured to adjust pulse width of echo included in the radar images or the echo signal according to the display range of the radar image.2. The radar device according to claim 1 , whereinthe first radar image production component and the second radar image production component produce radar images of the display ranges on the basis of a shared echo signal.3. The radar device ...

AMBIGUOUS RADAR RANGE RESOLUTION USING RANGE LOOKUP TABLE

System and method for determining range to targets using an M-of-N range resolver includes transmitting multiple coherent processing interval (CPI) signals with different pulse repetition frequencies (PRFs) towards the targets, receiving and storing threshold hits from prior N−1 CPIs; converting the threshold hits from the current CPI and prior N−1 CPIs to range unfolded threshold hits; generating a lookup table of the plurality of range unfolded threshold hits from the prior N−1 CPIs; determining the number of the prior N−1 CPIs in which a range unfolded threshold hit from the current CPI has at least one range coincident range unfolded threshold hit from a prior CPI utilizing the lookup table; generating a range resolved threshold hit when the number is greater than or equal to M−1; accumulating range resolved threshold hits; and determining the range to the targets. 1. A method , executed by a radar system , for determining range to targets using an M-of-N range resolver , the method comprising:a) transmitting multiple coherent processing interval (CPI) signals with different pulse repetition frequencies (PRFs) towards the targets;b) receiving and storing a plurality of threshold hits from prior N−1 CPIs, where N is an integer greater than 1;c) receiving a plurality of threshold hits from a current CPI;d) converting a plurality of received threshold hits from the prior N−1 CPIs to range unfolded threshold hits;e) converting a plurality of received threshold hits from the current CPI to range unfolded threshold hits;f) generating a lookup table of the plurality of range unfolded threshold hits from the prior N−1 CPIs, based on the CPI of each range unfolded threshold hit and a range of each range unfolded threshold hit;g) determining the number of the prior N−1 CPIs in which a range unfolded threshold hit from the current CPI has at least one range coincident range unfolded threshold hit from the prior CPI, utilizing the lookup table;h) generating a range resolved ...

Modular object-oriented digital sub-system architecture with primary sequence control and synchronization

The present disclosure relates to digital signal processing architectures, and more particularly to a modular object-oriented digital system architecture ideally suited for radar, sonar and other general purpose instrumentation which includes the ability to self-discover modular system components, self-build internal firmware and software based on the modular components, sequence signal timing across the modules and synchronize signal paths through multiple system modules.

APPARATUS FOR DETECTION AND RANGING

A controller for a FMCW radar system configured to: 1. A controller for a Frequency Modulated Continuous Wave , FMCW , radar system configured to:provide for emission by the FMCW radar system of a plurality of consecutive frequency modulated detection signals for detection and ranging, each of the frequency modulated detection signals varying between an initial frequency and a final frequency over a period of time extending from a start time of the frequency modulated detection signal to an end time of the frequency modulated detection signal; whereinat least one of said consecutive frequency modulated detection signals is provided with an offset to one or more of:the start time of the frequency modulated detection signal relative to a predetermined start time schedule;the end time of the frequency modulated detection signal relative to a predetermined end time schedule;the initial frequency of the frequency modulated detection signal relative to a predetermined initial frequency schedule; andthe final frequency of the frequency modulated detection signal relative to a predetermined final frequency schedule;the offset based on a random value.2. The controller for a FMCW radar system of wherein the random value is a pseudo-random value.3. The controller for a FMCW radar system of wherein the pseudo-random value is generated by a linear-feedback shift register.4. The controller for a FMCW radar system of wherein the offset comprises a maximum offset value multiplied by a factor between −1 and 1 claim 1 , the factor determined from the random value.5. The controller for a FMCW radar system of wherein the time difference between the start time and the end time comprises a fixed predetermined time and claim 1 , correspondingly claim 1 , any offset applied to one of the start time and the end time is equally applied to the other of the end time and the start time.6. The controller for a FMCW radar system of wherein the frequency difference between the initial frequency ...

MULTI-PATH MITIGATION IN RANGEFINDING AND TRACKING OBJECTS USING REDUCED ATTENUATION RF TECHNOLOGY

An autonomous system with no Customer Network Investment is described, wherein the system is configurable to operate on in a band in addition to the LTE band. Such system allows the definition of hybrid operations to accommodate the positioning reference signals (PRS) of LTE and already existing reference signals. The system can operate with PRS, with other reference signals such as cell-specific reference signals (CRS), or with both signal types. As such, the system provides the advantage of allowing network operator(s) to dynamically choose between modes of operation depending on circumstances, such as network throughput and compatibility. The system further enables information collected at a network device to be processed at a locate server without involving any processing at the network device. 1. A method for tracking and locating a wireless network device in communication with a network , comprising:receiving at a locate server unit information collected at a wireless network device in the network, wherein the collected information includes a reference signal or a plurality of known signal samples; andwithout processing the collected information for location purposes at the wireless network device, calculating at the locate server unit a location of the wireless network device based on the collected information.2. The method of claim 1 , wherein the plurality of known signal samples are in a digital format in one of time domain claim 1 , as in-phase and quadrature (I/Q) samples claim 1 , or frequency domain claim 1 , as resource elements.3. The method of claim 1 , wherein the network includes a plurality of wireless network nodes claim 1 , wherein each wireless network node includes one or more antennas claim 1 , wherein the wireless network device includes a single antenna in communication with the network claim 1 , and wherein the single antenna of the wireless network device is within receive range of at least two or more wireless network nodes among the ...

Method for detecting a target by means of a HPRF radar

Laser obstacle detection and display

Apparatus, for detecting at least one object and preventing receiver burn out, mounted on a vehicle, including a laser and at least one receiver, the receiver being coupled with the laser, the laser for transmitting a beam of light and the receiver for detecting reflections of the beam of light from the object, the laser including at least one signal diode, a commutator, a power supply signal diode driver, a circulator, an erbium doped fiber (EDF), a wavelength division multiplexer (WDM), a narrow band Bragg reflector, a first fiber pump diode, an output combiner and a second fiber pump diode, the commutator being coupled with each signal diode and the power supply signal diode drive, the circulator being optically coupled with each signal diode, the EDF and the output combiner, the WDM being optically coupled with the EDF, the narrow band Bragg reflector and the first fiber pump diode and the second fiber pump diode being optically coupled with the output combiner, each signal diode generating a beam of light distinct from one another, the power supply signal diode driver for supplying energy to each signal diode, the circulator for directing the beam of light in at least one of at least two different directions, the EDF for amplifying the beam of light thereby producing an amplified beam of light, the narrow band Bragg reflector for reflecting only the amplified beam of light through the EDF a second time, thereby producing a double amplified beam of light and the first fiber pump diode and the second fiber pump diode for pumping the EDF, wherein the WDM and each of the signal diodes are located on opposite sides of the EDF, wherein the output combiner outputs the beam of light, wherein the commutator enables each signal diode, one at a time, to draw a predetermined amount of energy from the power supply signal diode driver, wherein one signal diode generates a low energy beam of light and another one generates a high energy beam of light, wherein the low energy ...

Laser obstacle ranging and display

A novel laser obstacle warning and ranging system, for detecting hard-to-see long and thin obstacles in particular, comprises a fiber laser including a signal diode, a circulator, an erbium doped fiber, a wavelength division multiplexer, a narrow band reflector, a first fiber pump diode, an input combiner, an erbium-ytterbium co-doped fiber, a second fiber pump diode, an output combiner and a third fiber pump diode.

例えばバイスタティックレーダ応用に用いられる装置

Method for single channel heterodyne distance measurement

The high-precision distance measuring method involves recording of radiation (RS), back-scattered from target, and radiation (IS), passing along reference path (6), in parallel. The recording is done in such a way that received signal comprises components of the back-scattered radiation and radiation passing along the reference. Independent claims are also included for the following: (A) a computer program product with program code for the execution of the method; and (B) a distance measuring device for the execution of the method.

Patent FR3034513A1

L'invention concerne un procédé d'estimation de la distance d'un objet comprenant : déterminer, par un dispositif de mesure de distance, une première valeur de distance (RANGE_A) sur la base d'un temps de parcours d'une première pluralité d'impulsions optiques ayant une période d'une première durée ; déterminer, par le dispositif de mesure de distance, une deuxième valeur de distance (RANGE_B) sur la base d'un temps de parcours d'une deuxième pluralité d'impulsions optiques ayant une période d'une deuxième durée différente de la première durée ; et estimer la distance sur la base des première et deuxième valeurs de distance (RANGE_A, RANGE_B). The invention relates to a method for estimating the distance of an object comprising: determining, by a distance measuring device, a first distance value (RANGE_A) on the basis of a travel time of a first plurality optical pulses having a period of a first duration; determining, by the distance measuring device, a second distance value (RANGE_B) based on a travel time of a second plurality of optical pulses having a period of a second duration different from the first duration; and estimating the distance based on the first and second distance values (RANGE_A, RANGE_B).

Single-channel heterodyne distance-measuring method

According to the invention, high precision distance measurement may be carried out by the broadcast of pulsed electromagnetic radiation (ES) with at least two pulse repetition frequencies, whereby the pulse repetition frequencies are selected such that the corresponding pulse separations do not have a common multiple in the range of the order of magnitude of a maximum external measurement range. The radiation is hence transmitted both to a target for measurement over the measurement path outside the device and also over a reference path inside the device, whereby the radiation (IS) passing along the reference path defines at least one start pulse and the radiation (ES) passing along the measurement path defines at least one stop pulse.

Single-channel heterodyne distance measuring method

According to the invention, high precision distance measurement may be carried out by the broadcast of pulsed electromagnetic radiation (ES) with at least two pulse repetition frequencies, whereby the pulse repetition frequencies are selected such that the corresponding pulse separations don not have a common multiple in the range of the order of magnitude of a maximum external measurement range. The radiation is hence transmitted both to a target for measurement over the measurement path outside the device and also over a reference path (6) inside the device, whereby the radiation (IS) passing along the reference path (6) defines at least one start pulse and the radiation (ES) passing along the measurement path defines at least one stop pulse. The radiation (RS) back-scattered from the target and the radiation (IS) passing along the reference path are received and converted into a received signal, from which at least one distance to the at least one target is determined. The radiation (RS) back-scatted from the target and the radiation (Is) passing along the reference path (6) are recorded in parallel, such that the received signal comprises components of the radiation (RS) back-scattered from the target sand the radiation (IS) passing along the reference path.

Pulse radar

Weather radar equipment

Method for uniquely determining a distance and / or a relative speed of an object, driver assistance device and motor vehicle

Die Erfindung betrifft ein Verfahren zum eindeutigen Bestimmen einer Entfernung und/oder einer relativen Geschwindigkeit eines Objektes bezüglich eines Kraftfahrzeugs (1) mittels eines Frequenzmodulation-Dauerstrich-Radargeräts (3, 4) des Kraftfahrzeugs (1), wobei in einem Messzyklus eine vorbestimmte Folge von frequenzmodulierten Signalpulsen (23) durch das Frequenzmodulation-Dauerstrich-Radargerät (3, 4) gesendet wird, durch welche ein Eindeutigkeitsbereich (R Ein ) für die Entfernung und/oder ein Eindeutigkeitsbereich (V Ein ) für die relative Geschewindigkeit bestimmt ist, wobei für zumindest zwei aufeinander folgende Messzyklen sich voneinander unterscheidende Eindeutigkeitsbereiche (R Ein ) für die Entfernung und/oder sich voneinander unterscheidende Eindeutigkeitsbereiche (V Ein ) für die relative Geschwindigkeit festgelegt werden und die Entfernung und/oder die relative Geschwindigkeit anhand von jeweils zumindest einem Messwert für die Entfernung und/oder für die relative Geschwindigkeit aus jedem Messzyklus bestimmt wird. The invention relates to a method for uniquely determining a distance and / or a relative speed of an object with respect to a motor vehicle (1) by means of a frequency modulation continuous wave radar device (3, 4) of the motor vehicle (1), wherein in a measuring cycle a predetermined sequence of frequency modulated signal pulses (23) is transmitted by the frequency modulation continuous wave radar device (3, 4), by which a uniqueness range (R Ein ) for the distance and / or a uniqueness range (V Ein ) is determined for the relative speed, wherein for at least two consecutive measuring cycles are determined for unambiguous unambiguous ranges (R Ein ) for the distance and / or different unambiguity ranges (V Ein ) for the relative speed and the distance and / or the relative speed on the basis of at least one measured value for the distance and / or for the rel Ative speed is determined from each measurement cycle.

Method and device for deriving geodetic distance data

Single-channel heterodyne distance measuring method

本发明涉及单通道外差距离测量方法。根据本发明，可以通过使用至少两个脉冲重复频率来广播脉冲电磁辐射(ES)而执行高精度的距离测量，将这些脉冲重复频率选择为使得对应的脉冲间隔在最大外部测量范围的数量级范围内不具有公倍数。因此，既通过装置外部的测量路径向测量目标发射辐射，又通过装置内部基准路径(6)发射辐射，由此，沿基准路径(6)传送来的辐射(IS)限定至少一个起始脉冲，沿测量路径传送来的辐射(ES)限定至少一个停止脉冲。接收从目标散射回的辐射(ES)和沿基准路径传送来的辐射(IS)，并且将它们转换成接收信号，由此确定距至少一个目标的至少一个距离。并行地记录从目标散射回的辐射(RS)和沿基准路径(6)传送来的辐射(IS)，从而使得接收信号包括从目标散射回的辐射(RS)的分量和沿基准路径传送来的辐射(IS)的分量。

Signal detecting device

(57)【要約】本公報は電子出願前の出願データであるた め要約のデータは記録されません。

Method for unambiguously determining a range and/or a relative speed of an object, driver assistance device and motor vehicle

本发明涉及借助属于机动车辆（1）中的频率调制连续波雷达（3、4）来进行物体相对于机动车辆（1）的距离和/或相对速度的不模糊确定的方法，其中，在测量周期中，频率调制连续波雷达（3、4）发射预定序列的调频信号脉冲（23），通过所述序列，确定用于距离的不模糊区域（R Ein ），和/或确定用于相对速度的不模糊区域（V Ein ），其中，用于距离的互相不同的不模糊区域（R Ein ）和/或用于相对速度的互相不同的不模糊区域（V Ein ）针对至少两个接连的测量周期被定义，以及距离和/或相对速度通过相应地使用来自每一个测量周期的对于距离和/或相对速度的至少一个测量值而确定。

Apparatus for estimating frequency of radar signal and method thereof

The present invention relates to a frequency estimating device of a radar signal and a method thereof. The frequency estimating device of the radar signal according to the present invention comprises; a step of repeating a radar transmission signal of the pulse type of N having a PRI interval M times per frame and discharging it to one or more targets and receiving a radar receiving signal; a step of sampling the radar receiving signal; a step of estimating a pulse in which a transformed value becomes a maximum value as an integer unit by Fourier-transforming the sampled radar receiving signal; an obtaining a power value of the radar receiving signal per frame; a step of obtaining a decimal unit using a Fourier transformation value of the radar receiving signal and estimating the decimal unit by Fourier-transforming an obtained decimal unit value repeatedly; a step of measuring a final decimal unit using the estimated decimal unit and the power value; and a step of obtaining an estimating frequency of the radar receiving signal using the integer unit and the final decimal unit. According to the present invention as above, a Doppler frequency can be estimated accurately under a low SNR condition by estimating a weighted average Doppler frequency. Especially, the present invention has an excellent performance in comparison with a frequency estimating method according to a traditional technology because a signal received in an excellent SNR has a high weighted value.

Radar device

公开了一种雷达装置。雷达发送单元在规定的发送周期使用发送阵列天线发送雷达信号，雷达接收单元使用接收阵列天线接收被目标反射了雷达信号的反射波信号。发送阵列天线及接收阵列天线分别包含多个子阵列元件，多个子阵列元件在发送阵列天线及接收阵列天线中配置于第1方向的直线上，各子阵列元件包含多个天线元件，子阵列元件的大小在第1方向中大于期望的天线元件间隔，发送阵列天线的子阵列元件间隔和接收阵列天线的子阵列元件间隔之差的绝对值与期望的天线元件间隔相同。

Radar installations

发送雷达(1‑n TX )(n TX ＝1、2、…、N TX )通过以彼此不同的循环移位量Δτ(n TX )对同一代码序列进行循环移位而生成彼此不同的调制代码Code(n TX ，h)，并且使用彼此不同的调制代码Code(n TX ，h)，生成彼此不同的发送RF信号(4‑n TX )。由此，与使用正交的代码作为彼此不同的调制代码的情况相比，能够增加发送雷达1‑n TX 的数量从而提高目标的检测精度。

Measuring Method of Intruder Position of Intruding Detect Radar based on Reflection Plate and Method of Noise Definition for the above Method

본 발명 반사판 기반 침입 탐지 레이더에서 침입자 위치 측정 방법은 레이더에서 레이더 신호를 감지 구역으로 방사하는 단계와, 레이더 감지 영역 끝에 설치된 반사판에서 반사되는 레이더 반사 신호를 수신하는 단계와, 반사판의 위치를 산정하는 단계와, 레이더 수신 신호의 S/N을 산정하는 단계와, 상기 S/N을 기초로 반사판 위치의 신호가 기준보다 많이 변하는지 여부를 판단하는 단계와, 반사판이 아닌 다른 주파수에서 침입 신호가 있는지 여부를 판단하는 단계와, 다른 주파수에서의 침입 신호가 없는 경우에 레이더 또는 반사판 근거리 침입인지 여부를 판단하는 단계를 포함하여 이루어지는 것을 특징으로 하는 것이다. A method for measuring an intruder position in a reflection-based intrusion detection radar according to the present invention includes the steps of radiating a radar signal from a radar to a detection zone, receiving a radar reflection signal reflected from a reflector installed at an end of the radar detection region, Determining whether the signal of the reflector position changes more than a reference based on the S / N; determining whether there is an intrusion signal at a frequency other than the reflector; And judging whether or not it is a radar or reflector short-range intrusion in the absence of an intrusion signal at another frequency.

Device for distance measurement by pulse radar

본 발명은 펄스 주기에 의해서 결정되는 계측 한계 거리 이상의 거리로부터의 허상 에코를 확실하게 제거하는 펄스 레이더 장치를 제공한다. 상기 과제를 해결하기 위해서, 펄스 레이더 장치에, 다른 주기의 펄스 신호를 생성하는 OSC(9a∼9c)를 OSC 전환기(10)에 의해 소정의 간격으로 전환하여, 목표물에 대하여 송신하는 펄스 신호 송신 수단과, 목표물로부터의 반사 신호를 수신하여, 수신 데이터를 RAM(25) 상에 저장하는 반사 신호 수신 수단과, 제1 디지털 신호 프로세서(24)에 의해서 수신 데이터로부터 다른 주기의 펄스 신호에 대한 반사 신호마다 반사 신호 데이터를 취득하는 반사 신호 데이터 취득 수단과, 취득한 각각의 반사 신호 데이터에 대해서, 기준이 되는 펄스 신호의 송신시 이후 소정의 기간 동안 동일 지연 시간의 반사 신호의 수신 강도를 비교하여 반사 신호를 특정하는 반사 신호 특정 수단을 구비한다. The present invention provides a pulse radar device that reliably removes a virtual image echo from a distance above a measurement limit distance determined by a pulse period. In order to solve the said subject, the pulse radar apparatus transmits the OSC 9a-9c which produces the pulse signal of a different period by the OSC switch 10 at predetermined intervals, and transmits it to a target object. And reflected signal receiving means for receiving the reflected signal from the target and storing the received data on the RAM 25, and the reflected signal for the pulse signal of another period from the received data by the first digital signal processor 24; The reflected signal data acquiring means for acquiring the reflected signal data for each time and the received intensity of the reflected signal with the same delay time for each predetermined period after the transmission of the reference pulse signal with respect to each of the acquired reflected signal data are compared. And reflected signal specifying means for specifying.

Single channel heterodyne distance measurement method

Pulse doppler coherent method and system for snr enhancement

펄스-도플러 위상정합 표적 검출에서 신호대잡음비 증강을 위한 방법 및 장치. 본 발명의 방법에 따라서, 둘 또는 그 이상의 표적 구간 시간의 하위 구간 각각에 대한 복소수 신호는 얻어지고, 동시 범위와 도플러 계측을 허용한다. 위상정합누적은 전개되지 않은 복소수값의 행렬을 생성하기 위해 신호에서 수행된다. 전개되지 않은 행렬은 전개되고 표적 검출은 하나 또는 그 이상의 전개 행렬을 수반하는 처리과정에서 수행된다. 펄스-도플러 위상정합 시스템은 또한 본 발명의 방법에 의해 표적 검출에 대해 설정되고 제공된다. A method and apparatus for signal-to-noise enhancement in pulsed Doppler phase-matched target detection. According to the method of the present invention, a complex signal for each of the two or more sub-intervals of the target interval time is obtained, allowing simultaneous range and Doppler measurements. Phase-matched accumulation is performed on the signal to produce a matrix of unexpanded complex values. The undeveloped matrix is developed and target detection is performed in a process involving one or more developing matrices. Pulse-Doppler phase matching systems are also set up and provided for target detection by the method of the present invention. 신호대잡음비, 도플러, 위상정합, 위상정합처리구간 Signal to Noise Ratio, Doppler, Phase Matching, Phase Matching

RADAR DEVICE OPERATING BY HATCHED WAVES, FREQUENCY MODULATED

Patent FR2412852B1

Patent FR2411418B1

METHOD FOR MEASURING AIR SPEED BY RADAR DOPPLER

Device for producing a series of pulses with statistical variation of the interval between pulses

METHOD FOR OPTIMIZING THE DETECTION OF MARINE TARGETS AND RADAR USING SUCH A METHOD

La détection étant réalisée pour une mission donnée, le procédé comporte au moins : - Une phase (21) d'analyse de l'environnement à l'aide d'une forme d'onde (212) préalablement choisie, les signaux acquis avec cette forme d'onde étant analysés par des moyens de traitement (213) pour en déduire des caractéristiques d'environnement (222) ; - Une phase (22) d'élaboration d'une onde de détection (20) optimale en fonction desdites caractéristiques d'environnement et des caractéristiques de ladite mission. The detection being carried out for a given mission, the method comprises at least: - A phase (21) of analysis of the environment using a waveform (212) previously chosen, the signals acquired with this waveform being analyzed by processing means (213) to deduce environmental characteristics (222); - A phase (22) of developing an optimal detection wave (20) according to said environmental characteristics and the characteristics of said mission.

Patent JPS5245479B2

METHOD AND DEVICE FOR COMPENSATING THE SPEED OF CLOUD IN A COHERENT DOPPLER RADAR AT AMBIGUOUS VARIABLE SPEED

METHOD FOR DETECTING AT LEAST ONE PULSE DOPPLER RADAR TARGET WITH NON-AMBIGED RADIAL SPEED MEASUREMENT AND DOPPLER PULSE RADAR FOR IMPLEMENTING SUCH A METHOD

Procédé de détection d'au moins une cible par radar Doppler à impulsions comportant les étapes suivantes : a) générer une rafale d'impulsions radioélectriques cohérentes séparées d'un intervalle temporel (Tr(k)) variable d'une impulsion à l'autre ; b) recevoir des signaux susceptibles de contenir des échos (E) desdites impulsions provenant de ladite ou d'au moins une dite cible, les démoduler et les échantillonner ; c) les filtrer au moyen d'une pluralité de filtres (F-n ... F0 ...Fn) chaque dit filtre étant un filtre adapté à ladite rafale d'impulsions avec un décalage de fréquence différent, au moins certains desdits filtres appartiennent à une même classe d'ambiguïté, correspondant à des décalages de fréquence espacés entre eux de multiples entiers d'une fréquence moyenne de récurrence des impulsions de ladite rafale ; et d) résoudre l'ambigüité de fréquence en déterminant, parmi les signaux de sortie des filtres d'une même classe d'ambigüité, celui de magnitude plus élevée. Radar Doppler à impulsions pour la mise en œuvre d'un tel procédé. A method of detecting at least one Doppler pulse radar target comprising the steps of: a) generating a burst of coherent radio pulses separated by a time interval (Tr (k)) variable from one pulse to the next ; b) receiving signals capable of containing echoes (E) of said pulses originating from said at least one said target, demodulating them and sampling them; c) filtering them by means of a plurality of filters (Fn ... F0 ... Fn) each said filter being a filter adapted to said burst of pulses with a different frequency offset, at least some of said filters belong to the same class of ambiguity, corresponding to frequency shifts spaced apart from each other by integer multiples of an average frequency of recurrence of the pulses of said burst; and d) resolving the frequency ambiguity by determining, among the output signals of the filters of the same class of ambiguity, ...

IMPROVEMENTS ON PULSE DOPPLER RADARS

Discrete radar detection method and implementation system.

Le système radar de l'invention utilise un réseau de télévision numérique pour réaliser une configuration multistatique. Le signal émis est du type OFDM. Le(s) récepteur(s) réalise(nt) un filtrage adapté et récupère(nt) la synchronisation par traitement des cases à Doppler nul. The radar system of the invention uses a digital television network to achieve a multistatic configuration. The signal transmitted is of the OFDM type. The receiver (s) performs (s) appropriate filtering and recovers (s) synchronization by processing the boxes at zero Doppler.

RADAR PULSE-DOPPLER

RADAR PULSE-DOPPLER. POUR ELIMINER LES CIBLES LENTES ON PROCEDE A UNE IMBRICATION DES RAYONS D'ACTION PAR CHANGEMENT PERIODIQUE DE LA FREQUENCE DE REPETITION DES IMPULSIONS A L'INTERIEUR DE CHAQUE DUREE DE BALAYAGE DE LA CIBLE, DE MANIERE QU'EN UTILISANT PLUSIEURS COMPOSANTS COMMUNS D'UN SYSTEME (EMETTEUR, ANTENNE, ETC.) DE L'APPAREIL RADAR, A LIEU UN TRAITEMENT DES SIGNAUX SUBDIVISE EN FONCTION DU CHANGEMENT DE LA FREQUENCE DE REPETITION DES IMPULSIONS DANS UNE ZONE D'ACTION PROCHE ET UNE ZONE D'ACTION LOINTAINE, EN FAISANT EN SORTE QU'A L'EMISSION DES SIGNAUX RADAR A FREQUENCE DE REPETITION ELEVEE DES IMPULSIONS (PRF1) ET POUR UNE FREQUENCE LIMITE INFERIEURE ELEVEE DU FILTRE DES ECHOS FIXES, SEULE LA ZONE D'ACTION PROCHE SOIT EVALUEE ET QUE PENDANT L'EMISSION DES SIGNAUX RADAR A FREQUENCE DE REPETITION BASSE DES IMPULSIONS (PRF2) EXCLUSIVEMENT LA ZONE D'ACTION LOINTAINE SOIT EVALUEE. APPLICATION AUX RADARS A SUPPRESSION D'ECHOS FIXES. RADAR PULSE-DOPPLER. TO ELIMINATE THE SLOW TARGETS, AN NESTING OF THE RAYS OF ACTION BY PERIODIC CHANGE OF THE REPEAT FREQUENCY OF THE PULSES WITHIN EACH TARGET SCAN IS PERIODICALLY USED BY USING SEVERAL COMMON COMPONENTS OF ONE SYSTEM (TRANSMITTER, ANTENNA, ETC.) OF THE RADAR DEVICE, TAKES PLACE OF SUBDIVIDED SIGNAL PROCESSING ACCORDING TO THE CHANGE OF THE REPETITION FREQUENCY OF THE PULSES IN A NEAR ACTION ZONE AND A FAR ACTION ZONE, BY MAKING SO THAT AT THE EMISSION OF RADAR SIGNALS AT HIGH PULSE REPETITION FREQUENCY (PRF1) AND FOR A LOWER LIMIT FREQUENCY OF THE FIXED ECHO FILTER, ONLY THE NEAR AREA OF ACTION IS EVALUATED AND DURING THE EMISSION OF THE LOW PULSE REPETITION RADAR SIGNALS (PRF2) EXCLUSIVELY THE FAR ACTION ZONE IS EVALUATED. APPLICATION TO FIXED ECHO SUPPRESSION RADARS.

METHOD FOR PROCESSING A SIGNAL FORM OF A PULSE SEQUENCE

METHOD AND DEVICE FOR RADAR TRANSMISSION RECEPTION BY DYNAMIC CHANGE OF POLARIZATION, ESPECIALLY FOR THE IMPLEMENTATION OF INTERLACED RADAR MODES

Procédé et dispositif d'émission-réception radar par changement dynamique de polarisation notamment pour l'implémentation de modes radar entrelacés L'invention a pour objet un procédé d'émission-réception radar et un dispositif pour mettre en œuvre ce procédé, ledit procédé implémentant alternativement deux modes de fonctionnement, un mode courte portée exploitant des impulsions courtes et un mode longue portée exploitant des d'impulsions longues modulées, le procédé consistant, pour chaque mode, à: - produire deux signaux d'émission en radiofréquence (RF) synchrones présentant entre eux un déphasage θ de valeur donnée commandable; - rayonner deux ondes radioélectriques, correspondant chacune à un des signaux RF d'émission produits, au moyen de deux sources rayonnantes colocalisées présentant chacune un axe de polarisation donné; - réaliser la réception des signaux radioélectriques rétrodiffusés captés par chacune des sources rayonnantes et - délivrer deux signaux de réception en radiofréquence (RF) correspondant chacun au signal radioélectrique capté par une des sources rayonnantes, un déphasage θ' étant appliqué entre les deux signaux délivrés, θ' pouvant être déterminé comme étant égal à θ. Figure pour l’abrégé : Fig. 6 Method and device for radar transmission-reception by dynamic change of polarization in particular for the implementation of interlaced radar modes The subject of the invention is a radar transmission-reception method and a device for implementing this method, said method implementing alternately two operating modes, a short-range mode using short pulses and a long-range mode using modulated long pulses, the process consisting, for each mode, of: - producing two synchronous radiofrequency (RF) transmission signals exhibiting between them a phase shift θ of controllable given value; - radiating two radio waves, each corresponding to one of the RF emission signals produced, by means of two co-located radiating ...

Patent FR2041129A7

FIXED AND / OR MOBILE PULSE GENERATOR ARBITRAIREMENTALLY LARGE AND CONTROLLED BY INCREMENTS

GENERATEUR D'IMPULSIONS FIXES ETOU MOBILES A RETARD ARBITRAIREMENT GRAND ET CONTROLABLE PAR INCREMENTS COMPORTANT UNE LIGNE A RETARD 1 SIMPLE A RETARD FIXE, ET UN AMPLIFICATEUR 6 A GAIN VARIABLE, CONNECTE ENTRE LA SORTIE ET L'ENTREE DE LADITE LIGNE. APPLICATION AU DOMAINE RADAR. FIXED AND OR MOBILE PULSES GENERATOR WITH ARBITRARILY LARGE DELAY AND CONTROLABLE BY INCREMENTS FEATURING A SINGLE DELAY LINE 1 WITH FIXED DELAY, AND A VARIABLE GAIN AMPLIFIER 6, CONNECTED BETWEEN THE OUTPUT AND THE INPUT OF THE SAID LINE. APPLICATION TO THE RADAR DOMAIN.

Method and system for concatenation of radar pulses

A system and method are described for generating waveforms for use in radar and sonar systems. The system includes waveform generation circuitry a waveform generator and an up-conversion module. The waveform generator generates concatenated pulse waveforms at an IF band. In a given pulse repetition interval (PRI), the concatenated pulse waveforms comprise a first and second pulse types associated with first and second IF frequencies respectively. The up-conversion module up-converts the concatenated pulse waveforms to an RF band to form first and second sets of pulses. In the given PRI, each pulse is up-converted to a different RF frequency, pulses of different lengths are associated with a similar carrier frequency, and at least one pulse from each of the sets of pulses implements frequency diversity.

Doppler pulse radar with multiple repetition frequencies - transmits blocks of pulses, with pulse repetition frequency being randomly selected

The Doppler pulse radar with multiple repetition frequencies has blocks of large numbers of pulses. When radar antenna sweeps fixed point target the transmitter emits a sequence of blocks of successive pulses. Each block contains pulses of same width where the pulses in each block are transmitted at different repetition frequencies. Each block contains the same large number of pulses. During a sequence the pulse repetition frequencies for the blocks are randomly selected.

Improvements to doppler radar systems

Patent FR2440002B1

METHOD AND DEVICE FOR ELIMINATING MULTIPLE RETURN ECHOES FOR PULSE DOPPLER RADARS

L'INVENTION CONCERNE UN PROCEDE ET UN DISPOSITIF D'ELIMINATION DES ECHOS DE RETOURS MULTIPLES DANS UN RADAR DOPPLER A IMPULSIONS NON EQUIDISTANTES COHERENT SEULEMENT A LA RECEPTION. LE PRINCIPE DE L'INVENTION CONSISTE, POUR CHAQUE PORTE EN DISTANCE, A RECONNAITRE UN ECHO DE RETOURS MULTIPLES, PUIS A REMPLACER ALORS L'IMPULSION DE PHASE POLLUEE PAR LA PRECEDENTE. LA RECONNAISSANCE D'UN ECHO DE RETOURS MULTIPLES SE FAIT EN CALCULANT LA VALEUR ABSOLUE DE LA DIFFERENCE ENTRE LES DEUX DERNIERES IMPULSIONS DE PHASE RECUES, PUIS EN COMPARANT CETTE VALEUR ABSOLUE A LA MOYENNE DES N VALEURS ABSOLUES PRECEDENTES. UN ECHO DE RETOURS MULTIPLES EST RECONNU SI LE RESULTAT DU RAPPORT EST EGAL OU SUPERIEUR A UNE VALEUR DONNEE K. APPLICATION AUX RADARS. THE INVENTION RELATES TO A METHOD AND A DEVICE FOR ELIMINATION OF MULTIPLE RETURN ECHOES IN A NON-EQUIDISTANT PULSE DOPPLER RADAR COHERENT ONLY WITH RECEPTION. THE PRINCIPLE OF THE INVENTION CONSISTS, FOR EACH DISTANCE DOOR, OF RECOGNIZING AN ECHO OF MULTIPLE RETURNS, THEN REPLACING THE PHASE PULSE POLLUTED BY THE PREVIOUS ONE. THE RECOGNITION OF AN ECHO OF MULTIPLE RETURNS IS DONE BY CALCULATING THE ABSOLUTE VALUE OF THE DIFFERENCE BETWEEN THE LAST TWO PHASE PULSES RECEIVED, THEN COMPARING THIS ABSOLUTE VALUE TO THE AVERAGE OF THE N PREVIOUS ABSOLUTE VALUES. MULTIPLE FEEDBACK ECHO IS ACKNOWLEDGED IF THE REPORT RESULT IS EQUAL OR GREATER THAN A GIVEN VALUE K. APPLICATION TO RADARS.

Synthetic aperture radar

A method of operating synthetic aperture radar in a low PRF mode, comprising generating a stream of radar pulses, imposing onto said stream a predetermined modulation of the Pulse Repetition Frequency (PRF), directing said stream to a target area, and processing received pulses, comprising separating the received pulses as a sequence of sets, and superposing received radar pulses of said sets, whereby to enhance the central received lobe and to attenuate side lobes.

Synthetic aperture radar assembly and a method of creating a radar image of a planet surface using such an assembly

A synthetic aperture radar assembly (1) locatable on a satellite (2) for radar imaging of a planet surface (3) in swaths, including means (8) for transmitting pulses (4) of electromagnetic radiation towards the planet surface (3) to be imaged, means (8) for receiving echoes of said pulses (4) returned by said planet surface (3), means for creating an image of a swath (5) of said planet surface (3) from said returned echoes and means for randomly varying the frequency of transmission of said pulses (4) to increase the width (11) of swath (5) imagable.

METHOD AND DEVICE FOR EMISSION-RECEPTION RADAR BY DYNAMIC CHANGE OF POLARIZATION IN PARTICULAR FOR THE IMPLEMENTATION OF INTERLACED RADAR MODES

Procédé et dispositif d'émission-réception radar par changement dynamique de polarisation notamment pour l'implémentation de modes radar entrelacés L'invention a pour objet un procédé d'émission-réception radar et un dispositif pour mettre en œuvre ce procédé, ledit procédé implémentant alternativement deux modes de fonctionnement, un mode courte portée exploitant des impulsions courtes et un mode longue portée exploitant des d'impulsions longues modulées, le procédé consistant, pour chaque mode, à: - produire deux signaux d'émission en radiofréquence (RF) synchrones présentant entre eux un déphasage θ de valeur donnée commandable; - rayonner deux ondes radioélectriques, correspondant chacune à un des signaux RF d'émission produits, au moyen de deux sources rayonnantes colocalisées présentant chacune un axe de polarisation donné; - réaliser la réception des signaux radioélectriques rétrodiffusés captés par chacune des sources rayonnantes et - délivrer deux signaux de réception en radiofréquence (RF) correspondant chacun au signal radioélectrique capté par une des sources rayonnantes, un déphasage θ' étant appliqué entre les deux signaux délivrés, θ' pouvant être déterminé comme étant égal à θ. Figure pour l’abrégé : Fig. 6 Method and device for radar transmission-reception by dynamic change of polarization in particular for the implementation of interlaced radar modes The subject of the invention is a radar transmission-reception method and a device for implementing this method, said method implementing two operating modes alternately, a short-range mode exploiting short pulses and a long-range mode exploiting modulated long pulses, the method consisting, for each mode, in: - producing two synchronous radio frequency (RF) transmission signals having between them a phase shift θ of controllable given value; - radiating two radio waves, each corresponding to one of the RF transmission signals produced, by means of two collocated ...

Method for measurement of air speed by doppler radar

The invention relates to a method for measurement of air speed in an atmospheric region by means of the Doppler effect using radar, comprising the following steps: transmission of bursts of three pulses at different rates F1, F2, F3, determination of a speed V1, V2, V3 for the air from the reflected pulses of each burst and calculation of the air speed V from the air speeds V1, V2, V3 determined by the reflected pulses for each burst.

Bathroom fixture using radar detector having leaky transmission line to control fluid flow

Methods and devices for controlling the flow of fluid in fixtures, such as bathroom, restroom, or kitchen fixtures, using a radar detector with a leaky transmission line and fixtures using such methods and devices are provided. A bathroom fixture, in accordance with one embodiment of the invention, includes a fluid conduit, a radar detector for detecting one or more characteristics of one or more objects in a sensor field based on reflected electromagnetic signals from the one or more objects in the sensor field, and a controller coupled to the fluid conduit for controlling a flow of fluid in the fluid conduit in response to the detected one or more characteristics. The radar detector in particular includes a leaky transmission line for transmitting electromagnetic signals to form the sensor field and receiving the reflected electromagnetic signals. In accordance with one aspect of the invention, the sensor field is restricted from selected areas associated with spurious signals, such as areas of flowing water, areas near other fixtures, etc. The use of a radar detector with a leaky transmission line can, for example, improve the control of fluid flow in fixtures, such as bathroom fixtures.